| A | B |
| SUPERCILIUM | eyebrow |
| supercilious | haughty and aloof; disdainful |
| OS, ORIS; ORO, ORAVI, ORATUM | mouth; to speak |
| inexorable | relentless; unyielding |
| oracle | a person who transmits prophecy from a deity |
| oracle | a shrine where the ancient Greeks consulted one of their gods for advice or prophecy; a prophecy made at such a shrine |
| oration | a formal speech given on a special occasion |
| orifice | an opening; a mount or vent |
| osculate | to kiss (playfully) |
| DENS, DENTIS | tooth |
| indentation | a ct or notch |
| indenture | a written contract between two parties |
| indentures | (usu. plural) an agreement binding an apprentice to work for a master |
| trident | a long three-pronged fork or weapon |
| ODON, ODONTOS | tooth |
| orthodontist | a specialist who corrects irregularly positioned teeth |
| GURGES, GURGITIS | throat, whirlpool |
| gorge | a deep, narrow passage with rocky sides, enclosed between mountains |
| gorge (v) | to eat greedily; to fill full or stuff |
| disgorge | to vomit; to expel from the throat or stomach |
| gargantuan | of immense size |
| gargoyle | a grotesque carved human or animal figure, esp. one used as a rainspout |
| regurgitate | to surge back; to vomit |