- baron hermann ludwig ferdinand von helmholtz
- baron hugh caswall tremenheere dowding
- baron jean baptiste joseph fourier
- baron karl maria friedrich ernst von weber
- baron karl wilhelm von humboldt
- baron lister
- baron lloyd webber of sydmonton
- baron munchausen
- baron olivier of birghton
- baron richard von krafft-ebing
- baron snow of leicester
- baron verulam
- baron wilhelm von humboldt
- baronage
- baronduki
- baroness
- baroness dudevant
- baroness emmusca orczy
- baroness jackson of lodsworth
- baroness karen blixen
- baroness thatcher of kesteven
- baronet
- baronetage
- baronetcy
- baronetise
- baronetize
- barong
- baronial
- baronne anne louise germaine necker de steal-holstein
- barony
- baroque
- baroque era
- baroque period
- baroqueness
- baroreceptor
- barosaur
- barosaurus
- barouche
- barque
- barrack
- barracking
- barracouta
- barracuda
- barrage
- barrage balloon
- barrage fire
- barrage jam
- barrage jamming
- barramundi
- barranquilla
- barrater
- barrator
- barratry
- barred
- barred owl
- barred pickerel
- barrel
- barrel cactus
- barrel knot
- barrel maker
- barrel organ
- barrel roll
- barrel vault
- barreled
- barrelfish
- barrelful
- barrelhouse
- barrelled
- barrels
- barrel-shaped
- barren
- barren ground caribou
- barrenness
- barrenwort
- barrette
- barretter
- barricade
- barricaded
- barricado
- barrie
- barrier
- barrier island
- barrier reef
- barrier strip
- barring
- barrio
- barrister
- barroom
- bar-room plant
- barrow
- barrow-boy
- barrowful
- barrow-man
- barrow's goldeneye
- barrymore
- bars
- bar-shaped
- barstow
- bart
- bartender
- barter
- barter away
- barterer
- barth
- barthelme
- barthold george niebuhr
- bartholdi
- bartholin
- bartholin's gland
- bartholomeu dias
- bartholomeu diaz
- bartholomew roberts
- bartle frere
- bartlesville
- bartlett
- bartlett pear
- bartok
- bartolome esteban murillo
- bartolomeo alberto capillari
- bartolomeo prignano
- bartolomeo vanzetti
- bartolommeo eustachio
- bartonia
- bartram juneberry
- bartramia
- bartramia longicauda
- bartramian sandpiper
- baruch
- baruch de spinoza
- barunduki
- barycenter
- barye
- baryon
- baryon number
- baryshnikov
- baryta
- barytes
- barytic
- barytone
- bas bleu
- bas mitzvah
- bas relief
- basal
- basal body temperature
- basal body temperature method
- basal body temperature method of family planning
- basal ganglion
- basal metabolic rate
- basal metabolism
- basal placentation
- basal temperature
- basal vein
- basalt
- basaltic
- bascule
- base
- base hit
- base metal
- base of operations
- base on balls
- base pair
- base rate
- base runner
- baseball
- baseball bat
- baseball cap
- baseball card
- baseball clinic
- baseball club
- baseball coach
- baseball diamond
- baseball equipment
- baseball field
- baseball game
- baseball glove
- baseball league
- baseball manager
- baseball mitt
- baseball play
- baseball player
- baseball score
- baseball season
- baseball swing
- baseball team
- baseboard
- baseborn
- based
- base-forming
- basel
- baseless
- baseline
- basely
- basement
- baseness
- basenji
- bash
- bashful
- bashfully
- bashfulness
- basia