A few examples are... oyster, coy, buoyant
Hi. If you're including "oy" in the word; "enjoy" is a five letter word that ends with "oy" enjoy
The word "oyster" has two syllables: "oy-ster".
OY is a Yiddish word - it is usually part of the phrase "oy vey" which means "oh woe" or "alas" but occasionally you see it alone. It is a term of despair which is used as an exclamation in time of trouble and strife.
I am = Soy Am = Oy
One word is "pointless" (as in a useless act).
Ahoy
The word "futile" fits the criteria for a 9-letter word meaning useless with the vowel sound oi or oy.
The likely word is "voyage."
loyal
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.
enjoy
Oy (אוי) = "Oh" or "Alas"