16-Letter Words Starting With O
Looking for sixteen-letter words that start with O? There are 76 of them in the ENABLE dictionary, and every one is on this page. The most common, like OLIGONUCLEOTIDES, OPHTHALMOLOGISTS, OLIGOSACCHARIDES, sit right at the top.
Unlike alphabetical lists that bury likely answers in the middle, this list is sorted by how often each word appears in everyday English. Scan the first rows for probable answers; dig deeper for rare, high-scoring plays.
Most common
- oligonucleotides20
- ophthalmologists27
- oligosaccharides25
- organophosphorus27
- organizationally29
- organophosphates27
- ophthalmological29
- oligodendrocytes24
- oversubscription25
- otolaryngologist21
- overexploitation28
- overcompensating26
- overcompensation25
- objectifications32
- objectlessnesses27
- obsequiousnesses27
- obstreperousness20
- obstructionistic22
- oleaginousnesses17
- oligodendroglial20
All 76 words (the small number on each word is its Scrabble point value)
- oligodendroglias 20
- oligomerizations 28
- onomatopoeically 25
- openhandednesses 23
- operationalistic 20
- ophthalmoscopies 30
- opinionativeness 21
- oppressivenesses 23
- organoleptically 24
- organomercurials 21
- ornithologically 25
- orthogenetically 25
- orthographically 30
- orthopsychiatric 31
- ostentatiousness 16
- osteoarthritides 20
- otherworldliness 23
- otolaryngologies 21
- outdoorsmanships 24
- outlandishnesses 20
- outrageousnesses 17
- overaccentuating 24
- overachievements 29
- overapplications 25
- overarticulating 22
- overcapitalizing 33
- overcentralizing 31
- overcommunicated 28
- overcommunicates 27
- overcompensatory 28
- overcomplicating 28
- overconservative 27
- overconstructing 24
- overconsumptions 25
- overcultivations 24
- overdevelopments 27
- overelaborations 21
- overembellishing 27
- overenthusiastic 24
- overexaggerating 29
- overexaggeration 28
- overexpectations 30
- overgeneralizing 30
- overgenerosities 20
- overhomogenizing 35
- overindebtedness 23
- overorchestrated 25
- overorchestrates 24
- overprescription 25
- overproportioned 24
- overspecializing 33
- overspeculations 23
- overstimulations 21
- overutilizations 28
- oxyphenbutazones 42
- oxytetracyclines 33
Points use Scrabble US letter values
Frequently asked questions
How many sixteen-letter words are there that start with O?
There are 76 sixteen-letter words that start with O in the ENABLE dictionary. The most common are OLIGONUCLEOTIDES, OPHTHALMOLOGISTS, OLIGOSACCHARIDES.
What are common sixteen-letter words that start with O?
OLIGONUCLEOTIDES, OPHTHALMOLOGISTS, OLIGOSACCHARIDES, ORGANOPHOSPHORUS, ORGANIZATIONALLY are the most frequently used. The full list of 76 words on this page is sorted by everyday frequency, so the common ones come first.
Why are the words in this order?
Words are ranked by how often they appear in a trillion-word corpus of written English, most common first. That surfaces likely puzzle answers instead of hiding them mid-alphabet. Use the sort control to switch to alphabetical or points order.
Starting with O in other lengths
- 2-Letter Words Starting With O
- 3-Letter Words Starting With O
- 4-Letter Words Starting With O
- 5-Letter Words Starting With O
- 6-Letter Words Starting With O
- 7-Letter Words Starting With O
- 8-Letter Words Starting With O
- 9-Letter Words Starting With O
- 10-Letter Words Starting With O
- 11-Letter Words Starting With O
- 12-Letter Words Starting With O
- 13-Letter Words Starting With O
- 14-Letter Words Starting With O
- 15-Letter Words Starting With O
- 17-Letter Words Starting With O
- 18-Letter Words Starting With O
- 19-Letter Words Starting With O
- 20-Letter Words Starting With O