Daily word games to challenge your mind
For puzzles requiring OS prefixes, here are all 10-letter word options. Popular examples include OSCILLATED, OSCILLATES, OSCILLATOR, plus OSCULATING, OSCULATION, OSCULATORY and many more. Use the table below to find the perfect word for your game.
| Word | Definition | Length | Syllables |
|---|---|---|---|
| oscillated | 10 | 4 | |
| oscillates | 10 | 4 | |
| oscillator | 10 | 4 | |
| osculating | 10 | 4 | |
| osculation | 10 | 4 | |
| osculatory | 10 | 5 | |
| osmeterium | 10 | 4 | |
| osmiridium | 10 | 4 | |
| osmolality | 10 | 5 | |
| osmolarity | 10 | 5 | |
| osmometers | 10 | 4 | |
| osmometric | 10 | 4 | |
| ossifrages | 10 | 4 | |
| osteitides | 10 | 4 | |
| ostensible | 10 | 3 | |
| ostensibly | 10 | 4 | |
| ostensoria | 10 | 4 | |
| osteoblast | 10 | 3 | |
| osteoclast | 10 | 3 | |
| osteocytes | 10 | 4 | |
| osteogenic | 10 | 4 | |
| osteopaths | 10 | 3 | |
| osteopathy | 10 | 4 | |
| osteosises | 10 | 4 | |
| ostracised | 10 | 4 | |
| ostracises | 10 | 4 | |
| ostracisms | 10 | 3 | |
| ostracized | 10 | 4 | |
| ostracizes | 10 | 4 | |
| ostracodes | 10 | 4 |
Are OS-starting words common?
OS is a frequent start; probing vowel swaps after OS quickly narrows options.
Is this list good for crosswords?
Yes—filter by length mentally and scan definitions when available.