- bacchanalian: drunkenly festive
- baleful: harmful, with evil intentions
- balk: to refuse, shirk; prevent
- balm: soothing, healing influence
- banter: playful conversation
- base: being of low value or position
- bastion: fortification, stronghold
- bay: to bark, especially in a deep prolonged way
- beatific: appearing to be saintly, angelic
- becalm: to make calm or still; keep motionless by lack of wind
- becloud: to confuse; darken with clouds
- beguile: to deceive, mislead; charm
- belabor: to insist repeatedly or harp on
- beleaguer: to harass, plague
- belfry: bell tower, room in which bell is hung
- belie: to misrepresent; expose as false
- bellow: to roar, shout
- bemuse: to confuse, stupefy; plunge deep into thought
- benighted: unenlightened
- benison: blessing
- bequeath: to give or leave through a will; to hand down
- berate: to scold harshly
- besmear: to smear
- bespatter: to spatter
- bestial: beastly, animal-like
- bestow: to give as a gift
- betoken: to indicate, signify, give evidence of
- bevy: group
- bicker: to have a petty argument
- bilateral: two-sided
- bilious: bad-natured
- billet: board and lodging for troops
- biped: two-footed animal
- blanch: to pale; take the color out of
- blandish: to coax with flattery
- blight: to afflict, destroy
- blithe: joyful, cheerful, or without appropriate thought
- bludgeon: to hit as with a short heavy club
- bluster: to boast or make threats loudly
- bonanza: extremely large amount; something profitable
- bonhomie: good-natured geniality; atmosphere of good cheer
- boor: crude person, one lacking manners or taste
- bountiful: plentiful
- brazen: bold, shameless, impudent; of or like brass
- breach: act of breaking, violation
- brigand: bandit, outlaw
- broach: to mention or suggest for the first time
- bromide: a dull, commonplace person or idea
- brusque: rough and abrupt in manner
- buffet: to strike, hit
- bulwark: defense wall; anything serving as defense
- burgeon: to sprout or flourish
- burly: brawny, husky
- bursar: treasurer
- bustle: commotion, energetic activity
- byway: back road