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Dictionary: Words Starting With O (Page 1)

Words 1–300 of 420 curated "O" words on SnagWord, each linking to its real, licensed definition.

oak oar oasis oat oath oatmeal obedience obedient obese obesity obey obi obit obituary object objectify objection objectionable objective objectively objectivity obligated obligation obligatory obliged oblique obliquely obliquity oblivion oblivious oblong obnoxious oboe obscene obscure obscurity observable observance observation observational observatory observe observed observer observing obsessed obsession obsessive obsidian obsolete obstacle obstetrics obstruction obstructive obtain obtainable obvious obviously oca occasion occasional occasionally occasions occidental occlusion occult occupancy occupant occupation occupational occupied occupy occur occurrence ocean oceanfront oceanic oceanography octal octane octave octet octopus ocular od odd oddly odds ode odor odour odyssey oe of off offbeat offence offend offended offender offending offense offensive offer offering offeror office officer official officially officiating offset offshore offspring oft often ogre oh ohm oil oiled oily ointment okay old older olfactory olive om ombudsman omega omen ominous omission omit omnibus on once oncogene oncology one oneness ongoing onion only onset onshore onslaught onstage ontology onward onwards onyx ooh ooze opacity opal opaque open opened opener opening openly openness opera operand operate operating operation operational operations operative operator ophthalmic ophthalmology opinion opium opponent opportunistic opportunity oppose opposed opposing opposite opposition oppressed oppression oppressive ops opt optic optical optically optics optimal optimally optimisation optimise optimism optimist optimistic optimization optimize optimum option optional optionally optometry opus or oracle oral orally orange orb orbit orbital orbiter orca orchard orchestra orchestral orchestrated orchid ordained ordeal order ordered ordering orderly ordinal ordinance ordinarily ordinary ordinate ordination ordnance ore oregano organ organic organisation organise organised organiser organism organization organizational organize organized organizer organs organza orgasm orgy orient oriental orientated orientation oriented orifice origami origin original originality originally originate origination originator ornament ornamental ornate orphan orphanage orphaned orthodontic orthodox orthodoxy orthogonal orthopaedic orthopaedics orthopedic orthopedics os oscillation oscillator oscilloscope osmosis osprey ostensibly osteoarthritis osteoporosis ostrich other otherwise otolaryngology otter ottoman ounce out

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