- Orientated Adj Past Participle Verb
- Orienteer Noun Verb
- Originate Verb
- Originate in Verb
- Ornament Noun Verb Adj
- Ornate Adj Verb
- Orphan Noun Verb Adj Past Participle
- Orphrey Noun Verb Adj
- Orthogonalize Verb
- Orthonormalize Verb
- Orthophotograph Noun Adj Verb
- Oscillate Verb
- Osculate Verb
- Osmose Verb Noun
- Ossify Verb
- Ostler Noun Verb
- Ostracise Verb
- Ostracize Verb Past Participle
- Otter Noun Adj Verb
- Oubliette Noun Verb
- Ought Verb
- Ought not Verb
- Oughter Verb
- Oust Verb
- Out Adj Adv Prep Verb Noun
- Outargue Verb
- Outbalance Verb Noun Pres. Participle Past Participle
- Outbargain Verb
- Outbid Verb
- Outblaze Verb Pres. Participle
- Outbluff Verb
- Outboast Verb
- Outbox Noun Verb Adj
- Outbrave Verb
- Outbreak Noun Adj Verb
- Outbreathe Verb
- Outbreed Verb
- Outbuild Verb
- Outbuy Verb
- Outcaste Noun Adj Verb
- Outclass Verb
- Outcrop Noun Verb Adj
- Outcross Noun Verb Adj
- Outcry Noun Verb
- Outdance Verb
- Outdare Verb
- Outdate Verb
- Outdent Noun Verb
- Outdistance Verb
- Outdo Verb
- Outdodge Verb
- Outdrive Noun Verb
- Outface Verb
- Outfeed Noun Verb Adj
- Outfight Verb
- Outfit Noun Verb Adj
- Outflank Verb Past Participle Pres. Participle
- Outfling Noun Verb
- Outflow Noun Verb Adj
- Outfly Verb