15-Letter Words Starting With O
- 232 words
- All English dictionaries
- Scrabble points
Popular 15-Letter Words Starting With O
The most familiar words on this list, with their Scrabble scores.
All 15-Letter Words Starting With O 232 words
How common is O at the start of fifteen-letter words?
Our combined English word list has 232 fifteen-letter words that start with O. They average 23.8 points, the best is OXYPHENBUTAZONE (41 points) and 50.9% end in S.
- Total words
- 232
- Average Scrabble score
- 23.8
- out of 41 max
- Everyday words
- 0%
- common in ordinary English
- Most common ending
- S
- 50.9% of words
Most common last letters
- s 50.9%
- g 15.5%
- d 9.5%
Top vowel pairs
- io20.3%
- ie8.6%
- ou8.6%
Share of words where these two vowels sit side by side.
Rare words worth knowing
Valid in this dictionary but rarely seen in everyday English.
Highest-scoring fifteen-letter word that starts with O
o 1x 8y 4p 3h 4e 1n 1b 3u 1t 1a 1z 10o 1n 1e 1
O 1 + X 8 + Y 4 + P 3 + H 4 + E 1 + N 1 + B 3 + U 1 + T 1 + A 1 + Z 10 + O 1 + N 1 + E 1 = 41 points
- Double word
- 82 pts
- Triple word
- 123 pts
Face value of the tiles, then the whole word on a double- or triple-word square (letter bonuses and bingos not included).
oxyphenbutazone
- nounan anti-inflammatory drug (trade name Tandearil) used to treat arthritis and bursitis
- Scrabble US
- Scrabble UK
- Words With Friends
Runners-up
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15-Letter Words Starting With O FAQ
How many fifteen-letter words that start with O are there?
There are 232 fifteen-letter words that start with O in our combined English word list. Other dictionaries give different totals, so switch dictionary at the top of the list to compare.
What is the highest-scoring fifteen-letter word that starts with O?
OXYPHENBUTAZONE is worth 41 points in Scrabble before any bonus squares. Other strong options are OVEREMPHASIZING (35), OOPHORECTOMIZED (34), OVERHOMOGENIZED (34).
What are some common fifteen-letter words that start with O?
Everyday examples include OPHTHALMOLOGIST, OBSTRUCTIVENESS, OVERCOMPENSATES, OVERCOMPENSATED, OVERSIMPLIFYING, OBSTRUCTIONISTS. Sort the list by "Most common" to see the familiar words first.
Which rare fifteen-letter words that start with O score well?
Uncommon but valid choices include OXYPHENBUTAZONE (41), OVEREMPHASIZING (35), OOPHORECTOMIZED (34), OVERHOMOGENIZED (34). Few players know them, so they can catch an opponent off guard.