Knob
Slob
Tomb Arab, Barb, Club, Drab, Grub, Herb, Verb.
buzzzz:)
Bellybuttons would be the longest word I can think of beginning with a 'b' and ending in an 's'.
Eight letter words beginning with b, ending with e:backsidebaselinebegrudgebelittleblockadeblockagebreakage
Scarab.
thumb
thumb
cherrub
Ballerina is one 9-letter word beginning with B and ending with A.
Some seven letter words starting with B are:bathtubdisturbperturbproverbrhubarbsuccumbtaxicabwashtub
carob climb
Caleb fdhrsb
bath