| A | B |
|---|
| Noxious | Adj: harmful to the health |
| Nuance | Noun: a delicate variation in tone, color, meaning, expression |
| Obese | Adj: extremely fat |
| Obstreperous | Adj: boisterous, unruly |
| Odium | Noun: hatred, the state of being hated |
| Officious | Adj: offering unnecessary and unwanted advice or service |
| Ominous | Adj: threatening, predicting evil |
| Omniscient | Adj: having unlimited knowledge; knowing everything |
| Ostensible | Adj: apparent; pretended; professed |
| Ostracize | Verb: to banish; to shut out from a group or society by common consent |
| Pandemonium | Noun: a wild disorder, noise or confusion |
| Parsimonious | Adj: too economical; stingy |
| Penitent | Adj: expressing sorrow for having sinned or done wrong |
| Pernicious | Adj: causing injury; evil or wicked |
| Pertinent | Adj: having to do with what is being considered |
