Some words that end with 'oy' are:
ahoy
alloy.
annoy.
boy.
buoy.
cloy
convoy.
coy.
decoy.
deploy.
employ.
enjoy
envoy.
Fauntleroy.
joy.
ploy.
savoy.
soy.
toy.
troy.
viceroy.
Hi. If you're including "oy" in the word; "enjoy" is a five letter word that ends with "oy" enjoy
Ahoy
enjoy
Ay, by, my, oy, Sy, Ty, Cy
Some words ending with OY are:ahoyalloyannoybatboybeachboybellboyboybuoybusboycloyconvoycorduroycowboycoydecoydeploydestroyemployenjoyenvoyhighboyhomeboyhouseboyjoykilljoylowboynewsboyoverjoypageboypaperboyplayboyploysavoyschoolboysoytallboytomboytoytroyviceroy
The word "futile" fits the criteria for a 9-letter word meaning useless with the vowel sound oi or oy.
loyal
appointment
olla Pronunciation: oy ya
envoy enjoy
The Yiddish word "oye" is typically spelled as "oy" or "oi" in English. It is an expression used to convey a variety of emotions such as surprise, dismay, or exasperation.
Canada - end with a, holly - end with y, way - end with ay, hey _ end with ey, enjoy - end with oy,