sunniness vs cheer

sunniness and cheer both are nouns.

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

As nouns, sunniness and cheer are synonyms defined as:

Other synonyms of sunniness include cheerfulness, sunshine.

sunniness (noun)	cheer (noun)
lightness created by sunlight	the quality of being cheerful and dispelling gloom
the quality of being cheerful and dispelling gloom	a cry or shout of approval

sunniness (verb)	cheer (verb)
	become cheerful
	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