elbow
thumb?
Water
petal?
diode
piece
third
thumb
index
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.
back
Four (4) letter word from the word PARTY: part. prat. arty. tray. prat. pray. tarp. rapt. paty. Five (5) letter word from the word PARTY: praty. yrapt.