uncheerful vs drab

uncheerful is not a noun while drab is a noun.

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

uncheerful (noun)	drab (noun)
	a dull greyish to yellowish or light olive brown

uncheerful (adjective)	drab (adjective)
causing sad feelings of gloom and inadequacy	of a light brownish green color
	lacking brightness or color; dull
	causing dejection
	lacking in liveliness or charm or surprise