- barkeeper
- barkeep
- basileus
- beginning rhyme
- belgian endive
- boulevardier
- basso continuo
- bass voice
- barite
- bass part
- basra
- barytes
- biont
- benthic division
- biogeographical region
- benthonic zone
- brute force
- bird's_nest fungus
- basidiomycete
- brown root rot fungus
- blastomycete
- bottom rot fungus
- basidiomycetous fungi
- bolete
- bryophyte
- beilsteins test
- beira
- being concerned about somebody's welfare
- being together
- being on the verge of death or departure
- body and soul
- blain
- bluish black
- book of susanna
- braque
- broken heart
- brigham young
- brightly
- bright prospects
- bright future
- bright as a button
- broken arch
- broken in
- broke up
- busted
- benny hill
- bring to book
- bayberry tallow
- bayberry wax
- bitumenoid