cheer vs sunniness

cheer and sunniness both are nouns.

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

As nouns, cheer and sunniness are synonyms defined as:

Other synonyms of cheer include cheerfulness, sunshine.

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

cheer (verb)	sunniness (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