| A | B |
| nirvana | noun a place of great peacec or happiness |
| nonentity | noun a person or thing of little importance |
| nonsequitur | noun something that does not logically follow |
| nubile | adj. a female suitable for marriage in regard to age and physical development |
| obdurate | adj. stubborn, hardheaded |
| obfuscate | verb to confuse; to bewilder |
| obloquy | noun a strong disapproval; a bad reputation resulting from public |
| obsequious | adj. excessively submissive or overly attentive |
| obviate | verb to prevent; to get around |
| offal | noun garbage; waste parts |
| olfactory | adj. pertaining to smell |
| onerous | adj. burdensome; heavy; hard to endure |
| onus | noun a burden, responsibility, obligation |
| optimum | noun the best, the most favorable, the ideal |
| opulent | adj. rich, luxurious, the trappings of great wealth |