7-letter words with O as the 1st letter and S as the 4th letter

An O _ _ S _ _ pattern narrows the search to 55 tournament-dictionary entries. Familiar options include OUTSIDE, OBESITY, ODYSSEY and OFFSIDE, while the full set ranges from everyday words to specialist vocabulary. Only 5 entries fall among the top 25,000 English words by frequency, so many answers will feel less familiar.

7-letter words with O first and S fourth at a glance

• All 55 matches begin with O and put S in position four; the list combines ENABLE, Collins and NWL2023 entries.
• Collins covers 54 words, compared with 49 in NWL2023 and 43 in ENABLE.
• OXYSOME leads the score table at 19; OXYSALT and OFFSCUM tie next at 17.
• S is the most common final letter: 12 words end there, versus 7 ending in N.

Which familiar words fit O _ _ S _ _?

Start with recognizable candidates: OUTSIDE, OBESITY, ODYSSEY, OFFSIDE, ONESELF and OFFSETS. OPOSSUM, ONESIES and OUTSOLE also fit, showing that the fixed S does not lock the final letters into one word family. Just 5 entries meet the common-word frequency cutoff, so recognition drops quickly after the obvious picks.

Endings give a quick way to prune the choices; S tops the list with 12 matches, N has 7, E has 6, and D and M each have 5. OUTSIDE, OFFSIDE and OUTSOLD illustrate three of those endings, while OARSMEN and OARSMAN take the N ending. Since S occurs internally and often at the end, check both slots before ruling out a candidate.

How do scores and dictionary coverage compare?

OXYSOME earns the highest score, 19, despite being far less familiar than OUTSIDE or ODYSSEY. OXYSALT and OFFSCUM each score 17, and OUTSIZE scores 16; ODYSSEY and OFFSIDE sit at 14. The ranking rewards valuable letters, not everyday vocabulary.

Treat the scoring leaders as dictionary-dependent plays: the combined set contains 55 7-letter words with O first and S fourth, but ENABLE has 43 and NWL2023 has 49. A word accepted in Collins can still be absent from another game's list, so confirm the ruleset before committing to OXYSOME or OXYSALT.

This is a small O-starting slice: the P-first pattern with S fourth has 218 matches, about four times as many as these 55. The contrast shows how sharply the first-letter constraint narrows this pattern.