Obeisance | Respect, Deference, Homage, Reverence, Honour |
Obligatory | Compulsory, Required |
Oblivion | Obscurity, Darkness, Blankness, Nothingness, Extinction |
Obnoxious | Revolting, Repulsive, Repugnant, Disgusting, Offensive |
Obsolete | Out-Date, Antiquated, Archaic, Ancient |
Obstinate | Stubborn, Persistent, Recalcitrant, Tenacious, Headstrong |
Obvious | Conspicuous, Definite |
Officious | Dictatorial, Intrusive, Meddlesome, Interfering, Obtrusive |
Omen | Premonition, Sign |
Omit | Exclude, Remove |
Opportune | Advantageous, Auspicious |
Opulent | Rich, Wealthy, Affluent, Prosperous |
Ostentatious | Showy, Flaunting, Boastful, Vain, Vainglorious, Flamboyant |
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