Bran, Brain, Brawn, Braun, Brazilian, Brazen
But U
buck
blurb
Brother
beam brim boom
Bastard
baleful
bookshop
Banana, bra, bonanza, boa, ballerina, barracuda, bologna, bandanna
Ballerina is one 9-letter word beginning with B and ending with A.
Benumb is a 6 letter word. It means to make numb.
* bluff * brief