13-Letter Words Starting With I
Our word finder knows 608 thirteen-letter words that start with I. Common picks such as INTERNATIONAL, INVESTIGATION, INSTITUTIONAL lead the list, which makes it faster to spot the word your puzzle is hiding.
Words are ordered by usage frequency in a trillion-word English corpus, which is the closest thing to "most likely answer first" that a word list can offer.
Most common
- international13
- investigation17
- institutional13
- informational18
- instructional15
- illustrations13
- inappropriate19
- independently20
- investigators17
- installations13
- interventions16
- investigating18
- incorporation17
- inspirational15
- incorporating18
- introductions16
- investigative20
- inconvenience20
- intentionally16
- interpersonal15
All 608 words (the small number on each word is its Scrabble point value)
- interestingly 17
- indispensable 18
- intracellular 15
- insignificant 19
- interpolation 15
- intersections 15
- interrogation 14
- instantaneous 13
- irresponsible 17
- intellectuals 15
- inadvertently 20
- inconsistency 20
- intercultural 15
- individuality 21
- improvisation 20
- invertebrates 18
- interruptions 15
- inexperienced 25
- incarceration 17
- intermediates 16
- immunizations 26
- intelligently 17
- insufficiency 26
- imperfections 22
- instrumentals 15
- intelligencer 16
- interoperable 17
- interconnects 17
- intrinsically 18
- interactively 21
- impossibility 22
- indeterminate 16
- interceptions 17
- immunological 20
- impressionist 17
- impressionism 19
- individualism 20
- instinctively 21
- idiosyncratic 21
- introspection 17
- instantiation 13
- incrementally 20
- incapacitated 20
- illuminations 15
- inconceivable 22
- infringements 19
- inexpensively 28
- intermountain 15
- immunotherapy 25
- involuntarily 19
- instabilities 15
- introspective 20
- intergalactic 18
- impersonation 17
- intelligences 16
- intramuscular 17
- irreplaceable 19
- impersonators 17
- insensitivity 19
- inevitability 21
- infinitesimal 18
- indescribable 20
- inhomogeneous 19
- ideologically 20
- immunosorbent 19
- intravenously 19
- impracticable 23
- intercellular 15
- incriminating 18
- investigatory 20
- inclusiveness 18
- interferences 18
- intravascular 18
- inexhaustible 25
- inflorescence 20
- interrogators 14
- inconsiderate 16
- interlocutory 18
- impermissible 21
- intermissions 15
- inconspicuous 19
- interregional 14
- ineligibility 19
- industrialist 14
- interruptible 17
- interpolating 16
- individualist 18
- irrepressible 17
- interrogating 15
- impersonating 18
- indeterminacy 21
- irrationality 16
- incommunicado 22
- inventiveness 19
- interrogative 17
- infallibility 21
- imaginatively 22
- isoproterenol 15
- incrimination 17
- immunologists 18
- interspecific 22
- instantiating 14
- invincibility 23
- imperceptible 23
- indefatigable 20
- insubstantial 15
- intermarriage 16
- interjections 22
- interrogatory 17
- inflexibility 28
- indoctrinated 17
- intracerebral 17
- inquisitively 28
- interpretable 17
- interrelation 13
- incorruptible 19
- integrability 19
- isomerization 24
- individuation 18
- interactional 15
- interlocutors 15
- imperialistic 19
- indifferently 23
- intransigence 16
- irresponsibly 20
- interposition 15
- inefficiently 24
- incredulously 19
- intraspecific 22
- inexpressible 24
- internalizing 23
- indiscretions 16
- imperceptibly 26
- intermingling 17
- irretrievably 21
- inhomogeneity 22
- impermissibly 24
- interchanging 20
- improbability 24
- improprieties 19
- intermetallic 17
- isocarboxazid 34
- individualize 27
- insurrections 15
- intercalation 15
- intrapersonal 15
- inviolability 21
- integumentary 19
- industrialism 16
- inspectorates 17
- intermittency 20
- incandescence 20
- incorporators 17
- impulsiveness 20
- irretrievable 18
- incontestable 17
- inflammations 20
- irrecoverable 20
- indescribably 23
- interbreeding 17
- insupportable 19
- intercessions 15
- incorrectness 17
- insectivorous 18
- inferentially 19
- iontophoresis 18
- inquisitorial 22
- intergranular 14
- intercropping 20
- introgression 14
- instrumenting 16
- indiscernible 18
- intrusiveness 16
- ineffectively 27
- insubordinate 16
- interdistrict 16
- intrathoracic 20
- insensibility 18
- industriously 17
- incompatibles 21
- indisposition 16
- incongruities 16
- interobserver 18
- incarcerating 18
- imperturbable 21
- infeasibility 21
- imponderables 20
- incongruously 19
- impoverishing 24
- interferogram 19
- illocutionary 18
- interparticle 17
- inaugurations 14
- industrialize 23
- invitationals 16
- incontestably 20
- ignominiously 19
- intercalating 16
- isolationists 13
- infiltrations 16
- inexpressibly 27
- inconceivably 25
- interspersing 16
- improvisatory 23
- intuitiveness 16
- imprisonments 19
- insensitively 19
- intermembrane 19
- isoantibodies 16
- infuriatingly 20
- incompetently 22
- ineffectually 24
- implantations 17
- isometrically 20
- inclinometers 17
- irrelevancies 18
- impersonality 20
- informalities 18
- invalidations 17
- interindustry 17
- indeterminism 18
- intermediated 17
- intoxications 22
- internalising 14
- intercommunal 19
- indefatigably 23
- irrationalism 15
- indispensably 21
- informatively 24
- instinctually 18
- improvidently 24
- idealizations 23
- infraspecific 25
- isoelectronic 17
- ichthyofaunae 27
- ichthyofaunal 27
- ichthyofaunas 27
- ichthyologies 25
- ichthyologist 25
- iconographers 21
- iconographies 21
- identicalness 16
- ideogrammatic 21
- idiomatically 21
- idiomaticness 18
- ignoblenesses 16
- illiberalisms 17
- illiberalness 15
- illiquidities 23
- illogicalness 16
- illusionistic 15
- illustriously 16
- imaginariness 16
- imagistically 21
- imitativeness 18
- immanentistic 19
- immaterialism 19
- immaterialist 17
- immateriality 20
- immaterialize 26
- immediateness 18
- immensenesses 17
- immigrational 18
- immiscibility 24
- immoderations 18
- immortalising 18
- immortalities 17
- immortalizers 26
- immortalizing 27
- immovableness 22
- immunochemist 24
- immunogeneses 18
- immunogenesis 18
- immunogenetic 20
- immutableness 19
- impalpability 24
- impassability 22
- impassibility 22
- impassiveness 20
- impassivities 20
- impeccability 26
- impecuniosity 22
- impecuniously 22
- imperceivable 24
- impercipience 23
- imperfectives 25
- imperfectness 22
- imperiousness 17
- imperishables 22
- impermanences 21
- impermanently 22
- impersonalize 26
- impertinences 19
- impertinently 20
- imperturbably 24
- impetuosities 17
- impetuousness 17
- implacability 24
- implicatively 25
- impolitically 22
- importunately 20
- importunities 17
- impoverishers 23
- impracticably 26
- impractically 24
- impreciseness 19
- impregnations 18
- improvability 25
- improvidences 23
- improvisatore 20
- improvisatori 20
- improvisators 20
- impulsivities 20
- inactivations 18
- inadvertences 19
- inanimateness 15
- inappreciable 21
- inappreciably 24
- inarticulates 15
- inattentively 19
- incalescences 19
- incandescents 18
- incantational 15
- incapableness 19
- incapacitates 19
- incardination 16
- incarnadining 17
- incendiarisms 18
- incentivizing 28
- incinerations 15
- inclinational 15
- incognizances 27
- incombustible 21
- incommodities 20
- incompetences 21
- incongruences 18
- incongruently 19
- inconsecutive 20
- inconsequence 26
- inconsistence 17
- inconsonances 17
- inconstancies 17
- incontinences 17
- incontinently 18
- inconveniency 23
- inconvertible 20
- inconvertibly 23
- inconvincible 22
- incorporative 20
- incorporeally 20
- incorrigibles 18
- incorruptibly 22
- incorruptions 17
- incorruptness 17
- incredibility 21
- incredulities 16
- incriminatory 20
- incrustations 15
- incuriosities 15
- incuriousness 15
- indehiscences 21
- independences 19
- indeterminist 16
- indifferences 22
- indigestibles 17
- indisciplined 19
- indisciplines 18
- indissociable 18
- indissociably 21
- indistinctive 19
- individualise 18
- individuating 19
- indoctrinates 16
- indoctrinator 16
- indomethacins 21
- industrialise 14
- ineducability 21
- ineffableness 21
- inefficacious 23
- inegalitarian 14
- inexactitudes 23
- inexactnesses 22
- inexhaustibly 28
- inexorability 25
- inexpediences 25
- inexpediently 26
- inexperiences 24
- inexplainable 24
- infantilities 16
- infantilizing 26
- infectivities 21
- inferiorities 16
- infertilities 16
- infibulations 18
- inflationisms 18
- inflationists 16
- influenceable 20
- influentially 19
- informatorily 21
- infotainments 18
- infrequencies 27
- infusibleness 18
- ingeniousness 14
- ingenuousness 14
- ingratiations 14
- ingrownnesses 17
- ingurgitating 16
- ingurgitation 15
- inhabitancies 20
- inhabitations 18
- inheritresses 16
- inhospitality 21
- inhumannesses 18
- initialnesses 13
- injudiciously 26
- injuriousness 20
- innocuousness 15
- inobservances 20
- inoffensively 25
- inoperculates 17
- inopportunely 20
- inorganically 19
- inosculations 15
- inquisitional 22
- insalubrities 15
- insanitations 13
- insatiability 18
- insatiateness 13
- inscriptional 17
- inscriptively 23
- inseminations 15
- insidiousness 14
- insincerities 15
- insinuatingly 17
- insociability 20
- insolubilized 25
- insolubilizes 24
- insolubleness 15
- inspectorship 22
- inspiritingly 19
- inspissations 15
- instantaneity 16
- instantnesses 13
- instaurations 13
- instillations 13
- instructively 21
- insufflations 19
- insupportably 22
- insusceptible 19
- insusceptibly 22
- intangibility 19
- integralities 14
- intellections 15
- intemperances 19
- intemperately 20
- intenerations 13
- intensenesses 13
- intensionally 16
- intensiveness 16
- interbehavior 21
- interboroughs 19
- interchaining 19
- interchangers 19
- intercolonial 15
- intercompared 20
- intercompares 19
- interconverts 18
- intercortical 17
- intercrossing 16
- intercultures 15
- interdentally 17
- interdepended 18
- interdictions 16
- interdiffused 21
- interdiffuses 20
- interdigitate 15
- interdominion 16
- interelectron 15
- interepidemic 20
- interfamilial 18
- interglacials 16
- intergrafting 18
- interinvolved 20
- interinvolves 19
- interiorising 14
- interiorities 13
- interiorizing 23
- interknitting 18
- interknotting 18
- interlacement 17
- interlayering 17
- interlinearly 16
- intermarginal 16
- intermarrying 19
- intermeddlers 17
- intermeddling 18
- intermittence 17
- intermixtures 22
- internalities 13
- interneuronal 13
- interoceptive 20
- interoceptors 17
- interpandemic 20
- interpellated 16
- interpellates 15
- interpellator 15
- interpermeate 17
- interplanting 16
- interpleaders 16
- interpleading 17
- interpolative 18
- interpolators 15
- interproximal 24
- interracially 18
- interrelating 14
- interrogatees 14
- intersegments 16
- intersessions 13
- intersexually 23
- intersocietal 15
- interspersion 15
- interstadials 14
- interstimulus 15
- interstratify 19
- interterminal 15
- intertillages 14
- intertropical 17
- intertwisting 17
- interworkings 21
- intimidations 16
- intoxicatedly 26
- intradermally 19
- intragalactic 18
- intransigeant 14
- intransigents 14
- intraocularly 18
- intrapreneurs 15
- intrathecally 21
- intravenouses 16
- intrepidities 16
- intricateness 15
- introgressant 14
- introgressive 17
- introjections 22
- intromissions 15
- introspecting 18
- introversions 16
- intuitionisms 15
- intuitionists 13
- intumescences 19
- intussuscepts 17
- invaginations 17
- invariability 21
- invectiveness 21
- inveiglements 19
- inventorially 19
- inviabilities 18
- invidiousness 17
- invigilations 17
- invigorations 17
- inviolateness 16
- invisibleness 18
- iontophoreses 18
- iontophoretic 20
- ipsilaterally 18
- irascibleness 17
- irksomenesses 19
- ironmongeries 16
- irrationalist 13
- irreclaimable 19
- irreclaimably 22
- irrecoverably 23
- irreligionist 14
- irreligiously 17
- irreplaceably 22
- irrepressibly 20
- irresolutions 13
- irritableness 15
- isoagglutinin 15
- isoalloxazine 29
- isochromosome 22
- isochronously 21
- isolationisms 15
- isoprenalines 15
- isosmotically 20
- isostatically 18
- isotonicities 15
- italicization 24
Points use Scrabble US letter values
Frequently asked questions
How many thirteen-letter words are there that start with I?
There are 608 thirteen-letter words that start with I in the tournament word lists. The most common are INTERNATIONAL, INVESTIGATION, INSTITUTIONAL.
What are common thirteen-letter words that start with I?
INTERNATIONAL, INVESTIGATION, INSTITUTIONAL, INFORMATIONAL, INSTRUCTIONAL are the most frequently used. The full list of 608 words on this page is sorted by everyday frequency, so the common ones come first.
Can I play these words in Scrabble?
Yes. The list combines ENABLE and the North American tournament list (TWL), so these words are playable in Scrabble-style games, including Words With Friends.
Starting with I in other lengths
- 2-Letter Words Starting With I
- 3-Letter Words Starting With I
- 4-Letter Words Starting With I
- 5-Letter Words Starting With I
- 6-Letter Words Starting With I
- 7-Letter Words Starting With I
- 8-Letter Words Starting With I
- 9-Letter Words Starting With I
- 10-Letter Words Starting With I
- 11-Letter Words Starting With I
- 12-Letter Words Starting With I
- 14-Letter Words Starting With I
- 15-Letter Words Starting With I
- 16-Letter Words Starting With I
- 17-Letter Words Starting With I
- 18-Letter Words Starting With I
- 19-Letter Words Starting With I
- 20-Letter Words Starting With I