Here are some possible words:
backlash
backwash
badmouth
bakshish
becometh
begorrah
behemoth
bequeath
besmirch
bigmouth
birdbath
blackish
blandish
bleakish
blimpish
blockish
blondish
blowfish
bluefish
bonefish
brackish
brainish
brandish
brassish
brattish
bringeth
broadish
broguish
brownish
bullrush.
slippers, scissors
destatus
8 letter words beginning with B and ending with T: * backtalk * bankrupt * basement * besought * bookrest * bouffant * braggart * breakout
Charisma, chickpea, Casanova, Canberra
"Imperils" is a word that fits these qualifications.
headache. Here's one with 9 letters - heartache
trickier
ballista babushka bandanna bromelia bronchia Bulgaria
Inchworm - A small hairless caterpillar
An 8 letter word beginning with s and ending with e is:salvable or sauterne or scrapple or scrounge
libretti
undercutunionistuppercut