Depends a lot on what meaning of small you want! Some options for various definitions: baby/babyish, bantam, belittled, bitty, button.
brilliant
bereaved bitter blue
bare
The word is bawds. It means a madam.
Oh, dude, you're looking for a 7-letter word that starts with 'b' and means an error in judgment? That's like... 'blunder.' It's when you mess up big time and everyone's like, "Nice going, genius." So, yeah, 'blunder' is your word.
bondedbound
brilliant
bothersome
by all means
The brachium means arm.
bendable
It's a bouquet.
Bursting
bereaved bitter blue
brave
Botany
Broke means penniless.