Mammoth Uncensored Word List:
68 words ending with b, 4 letters long

barb bibb blab bleb blob blub boab bomb boob bulb chub club comb crab crib curb darb daub dieb doob dorb drab drib drub dumb feeb flab flub forb frab frib gamb garb glib glob grab grub herb jamb jibb kemb kerb knob knub krab lamb limb nimb numb scab sibb slab slob slub snab sneb snib snob snub stab stub swab swob tomb verb warb wemb womb