joy vs cheer

joy and cheer both are nouns.

Word	Noun	Adjective	Verb	Adverb
joy	Yes	No	Yes	No
cheer	Yes	No	Yes	No

As verbs, cheer is a hyponym of joy; that is, cheer is a word with a more specific, narrower meaning than joy:

Other hyponyms of joy include cheer up, chirk up, gladden, be on cloud nine, exult, jump for joy, walk on air.

joy (noun)	cheer (noun)
something or someone that provides a source of happiness	the quality of being cheerful and dispelling gloom
the emotion of great happiness	a cry or shout of approval

joy (verb)	cheer (verb)
feel happiness or joy	become cheerful
make glad or happy	spur on or encourage especially by cheers and shouts
	show approval or good wishes by shouting
	cause (somebody) to feel happier or more cheerful
	give encouragement to