The letters contain the 5 letter words stair and brats. The letters also spell the words bait, sat, stab, star, rat and tar.
Certainty.
One word containing the letters -bine is combine.
candidate
architectural
chubby
"MINNOW"
The shortest word containing the letters abcde is "abed."
ceviche
paucity
noticed
everywhere
Those six letters are "amount."