15-Letter Words Starting With O
There are 159 fifteen-letter words starting with O in our dictionary; 17 of them are common words.
Type your own letters to find only the 15-letter words you can make, or leave it empty to open this list in the word finder.
All 159 words
- ophthalmologist26 points
- oversimplifying29 points
- overcompensated25 points
- overcompensates24 points
- overemphasizing35 points
- overspecialized32 points
- overspecializes31 points
- obstructiveness22 points
- obstructionists19 points
- objectification31 points
- oversubscribing25 points
- overcapitalized32 points
- overcapitalizes31 points
- overgeneralized29 points
- overgeneralizes28 points
- overstimulating21 points
- oligonucleotide19 points
- oxytetracycline32 points
- orthopsychiatry31 points
- overdramatizing31 points
- ophthalmoscopes29 points
- overachievement28 points
- overcomplicated27 points
- organophosphate26 points
- overcommitments26 points
- overdevelopment26 points
- overfamiliarity26 points
- oceanographical25 points
- osteopathically25 points
- overprescribing25 points
- oligosaccharide24 points
- orthodontically24 points
- oversensitivity24 points
- observationally23 points
- overrefinements23 points
- overprotections22 points
- ontogenetically21 points
- osteomyelitides21 points
- overrepresented21 points
- omnidirectional20 points
- overstimulation20 points
- odoriferousness19 points
- opportunenesses19 points
- oxyphenbutazone41 points
- overhomogenized34 points
- overhomogenizes33 points
- ophthalmoscopic31 points
- overfertilizing31 points
- overglamorizing31 points
- occidentalizing30 points
- overcentralized30 points
- objectivenesses29 points
- orthogonalizing29 points
- overcentralizes29 points
- overexpectation29 points
- overextravagant29 points
- overwithholding29 points
- ovoviviparously29 points
- orthophosphates28 points
- overadjustments28 points
- overexaggerated28 points
- oligomerization27 points
- overclassifying27 points
- overconfidently27 points
- overexaggerates27 points
- overextractions27 points
- overutilization27 points
- overzealousness27 points
- offhandednesses26 points
- ophthalmologies26 points
- overcommunicate26 points
- overcompliances26 points
- overcomplicates26 points
- overconfidences26 points
- overembellished26 points
- overidentifying26 points
- overprogramming26 points
- oxidoreductases26 points
- omnicompetences25 points
- overcompressing25 points
- overembellishes25 points
- obnoxiousnesses24 points
- offensivenesses24 points
- overapplication24 points
- overconsumption24 points
- overdependences24 points
- overdocumenting24 points
- overimaginative24 points
- officiousnesses23 points
- oligodendrocyte23 points
- openmouthedness23 points
- oscillographies23 points
- outdoorsmanship23 points
- overabstracting23 points
- overaccentuated23 points
- overadvertising23 points
- overconstructed23 points
- overcultivation23 points
- overenthusiasms23 points
- overinvestments23 points
- overlengthening23 points
- overmedications23 points
- overorchestrate23 points
- overproductions23 points
- overspeculating23 points
- observabilities22 points
- overaccentuates22 points
- overcorrections22 points
- overdiscounting22 points
- overdiversities22 points
- overencouraging22 points
- overindulgences22 points
- overpopulations22 points
- overproportions22 points
- overspeculation22 points
- obstructionisms21 points
- openheartedness21 points
- opprobriousness21 points
- optoelectronics21 points
- organochlorines21 points
- outspokennesses21 points
- overarticulated21 points
- overcontrolling21 points
- overdecorations21 points
- overelaborating21 points
- overevaluations21 points
- overopinionated21 points
- overornamenting21 points
- oversweetnesses21 points
- obliviousnesses20 points
- obsessivenesses20 points
- obtrusivenesses20 points
- operativenesses20 points
- orchestrational20 points
- organomercurial20 points
- organometallics20 points
- outmanipulating20 points
- overarticulates20 points
- overassessments20 points
- overelaboration20 points
- overengineering20 points
- overestimations20 points
- overpersuasions20 points
- overstabilities20 points
- obtainabilities19 points
- oligodendroglia19 points
- operationalisms19 points
- orthogonalities19 points
- overeagernesses19 points
- overentertained19 points
- overingenuities19 points
- overregulations19 points
- opinionatedness18 points
- orientationally18 points
- osmoregulations18 points
- overintensities18 points
- oversaturations18 points
- obstinatenesses17 points
- operationalists17 points
Quick facts
- Total words: 159
- By usage: 1 very common, 16 common, 142 rare
Highest scoring (classic tiles)
- oxyphenbutazone 41
- overemphasizing 35
- overhomogenized 34
- overhomogenizes 33
- overcapitalized 32
- overspecialized 32
- oxytetracycline 32
- objectification 31
- ophthalmoscopic 31
- orthopsychiatry 31
Most common
- ophthalmologist
- oversimplifying
- overcompensated
- overcompensates
- overemphasizing
- overspecialized
- overspecializes
- obstructiveness
- obstructionists
- objectification
Definitions
- ophthalmologist (noun)
- A medical doctor specializing in the diagnosis and treatment of diseases of the eye.
- objectification (noun)
- The act of representing an abstraction as a physical thing.
This page lists every one of the 159 fifteen-letter words starting with O in our dictionary. Each word links to its own unscramble page when one exists, and the score badge shows its value with classic tiles. Common words come first, so OPHTHALMOLOGIST, OVERSIMPLIFYING and OVERCOMPENSATED sit near the top while the rare entries wait further down. If you are holding a specific rack, type it into the search box and the list narrows to the words you can actually play.
How to use this page
Begin with the search box if you are mid-game: your letters, plus question marks for blanks, produce the playable words instantly. Begin with the list if you are studying: the common words are at the top, the definitions section explains the most useful ones, and the quick facts show the top scorers.
Tips
A blank tile is the most powerful piece on your rack because it stands in for any letter. When you search this list with a blank, the tool underlines the letter the blank replaced so you know which tile to lay down. Spend a blank only when it unlocks a long word or a premium square; using it for a three-letter play is almost always a waste. If you hold two blanks, look for a word from this list that needs both, because a seven-tile play with the bonus outscores nearly everything else.
Questions
What is the highest-scoring word among the fifteen-letter words starting with O?
OXYPHENBUTAZONE scores 41 points with classic tile values, ignoring board multipliers. The full top ten is in the quick facts above; switch the tile set on the search tool if you play with different letter values.
Why are some of these words unfamiliar?
142 of the 159 words on this page are tagged rare, meaning they fall outside the usual spell-check vocabulary. They are still real words, and many are legal plays, but you should expect a challenge if someone asks you to define them.