Base of a triangle or breadth of a rectangle
b
Binary - A set of numbers with just two possibilities - usually 0 and 1
Any letter can be used for math. The most common is x, y, z, a, b, & c.
In math and algebra, a product is the result of multiplication. The product of a x b is ab.
Brackets
A 4 letter word that begins with B is bend.
bend..........
Boost is a synonym for the word lift and starts with the letter B.
baobab.
Blurb
butter
Birthday.
Bet
bunting
bathtub, brewpub
The word bat starts with the latter b and it ends with the latter a and t