biotic
Belated is a synonym for late. It begins with the letter b.
Boost is a synonym for the word lift and starts with the letter B.
A synonym for mistake starting with B is blunder (or boo boo).
Brighter.
start or starts
Bravery.
This could be the word "barber" or "beautician."
brush
Trade.
a strange painting =B
meek
The word here is probably not a noun, but the adjective "bitter."