however
If you mean a storage chest, then trunk is a 5-letter word for it. If you mean the upper part of the body, then torso is a 5-letter word for it.
eighteens
cardiac
The word Mollusk is a 7 letter word.
Bubonic.
wrinkle
The letters spell the 7 letter word endures. They also spell the word ensured.
broomstick
mistime
Mortify
The 7 letter word is "Capsule"
Trooper (Isusu).