hoy vs boat

hoy and boat both are nouns.

Word	Noun	Adjective	Verb	Adverb
hoy	Yes	No	No	No
boat	Yes	No	Yes	No

As nouns, boat is a hypernym of hoy; that is, boat is a word with a broader meaning than hoy:

hoy (noun)	boat (noun)
a flatbottom boat for carrying heavy loads (especially on canals)	a small vessel for travel on water
	a dish (often boat-shaped) for serving gravy or sauce

hoy (verb)	boat (verb)
	ride in a boat on water