There are 3 words that i know of: Cache, Mache and Tache
hope i could help :)
ache.
five (5) letter word ends with Q: tranq. umiaq. qepiq.
Hindu is a five letter word ending in u
Queer is a five letter word.
ennui
scuba
That's probably "ache." Check the "u."
One five letter word that ends in tow is artow.Another word is kotow.
bayou
Throw
Five
Ducat