| Backlash | Reaction, Backfire, Boomerang, Repercussion |
| Baffle | Confuse, Deceive |
| Banal | Common, Plain |
| Banish | Exile, Deport, Expel, Extradite |
| Beckon | Signal, Summon, Gesture, Call |
| Bedlam | Pandemonium, Uproar, Hubbub, Commotion |
| Beguile | Cheat, Delude, Deceive, Dupe |
| Behold | See, Look, Perceive, View |
| Belittle | Trivialize, Deprecate, Downgrade, Criticize |
| Belligerent | Warlike, Bellicose, Quarrelsome, Aggressive, Combative |
| Benefactor | Sponsor, Supporter, Donor, Patron |
| Benevolence | Kindness, Goodness, Generosity, Magnanimity |
| Berate | Scold, Chide, Abuse, Criticize, Disapprove |
| Berserk | Amok, Mad, Wild, Frenzied |
| Beseech | Implore, Plead, Beg, Entreat |
| Bewilder | Confuse, Perplex, Baffle, Puzzle, Befuddle |
| Bias | Inclination, Predisposition |
| Bizarre | Unusual, Peculiar, Weird, Whimsical |
| Bleak | Gloomy, Dismal, Depressing, Dreary |
| Bliss | Happiness, Joy |
| Brazen | Shameless, Outspoken, Rude, Insolent |
| Brink | Edge, Verge, Brim, Margin, Rim |
| Brisk | Fast, Swift |
| Brittle | Fragile, Breakable, Frail, Frangible |
| Budget | Allot, Plan |