cheer vs uncheerful

cheer is a noun but uncheerful is not a noun.

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

cheer (noun)	uncheerful (noun)
the quality of being cheerful and dispelling gloom
a cry or shout of approval

cheer (adjective)	uncheerful (adjective)
	causing sad feelings of gloom and inadequacy

cheer (verb)	uncheerful (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