There are no six-letter English words that end with QUA, but here are some other QUA words:
4-letter words
aqua
7-letter words
siliqua
10-letter words
chautauqua
Anthem is a six letter word ending with them.
Genius is a 6 letter word ending in ius
Six letter words ending in V are improv and maglev.
Deepsix.
agenda
cinema
a 6 letter word ending with a w is borrow.
yogurt
botany
gneiss
Scarab.
Leaguemorgueplaguetongue.