What are the synonyms for words that start with letter O? Synonyms words list, thesaurus words starting with O.
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Synonyms For Words Starting With O
| obdurate | stubborn |
| object | thing |
| obligatory | compulsory |
| oblique | indirect |
| obsolete | out of date |
| off-season | low season |
| Old | feeble, frail, ancient, weak, aged, used, worn, dilapidated, ragged, faded, broken-down, former, old-fashioned, outmoded, passe, veteran, mature, venerable, primitive, traditional, archaic, conventional, customary, stale, musty, obsolete, extinct |
| omnipotent | all-powerful |
| operate | function |
| oral | verbal |
| organic | biological |
| ornament | decoration |
| outside | external |
| overhaul | overtake |
| overlook | miss |
| overseas | abroad |
| oversee | supervise |
