I wasn't sure how many words you wanted:
You
Bayou
Plateau
Five letter words ending in U are bayou and snafu.
UlamaUlemaUltraUlulaUnciaUrmiaUvulaUzema
Plateau, caribou, jujitsu.
doubleyou, cortelyou
sayssawsseesspys
Five letter words ending in U are bayou and snafu.
Some six letter words ending in U are:bureaugateaulandaumilieumuumuu
Gnu. Emu You
UlamaUlemaUltraUlulaUnciaUrmiaUvulaUzema
undercutunionistuppercut
Jammu
Plateau, caribou, jujitsu.
doubleyou, cortelyou
sayssawsseesspys
In English, if a letter follows Q, it will be a U, so no words end in QI.
Four letter words using those letters and ending in 'l' are:haulhealteal
COIN