drabness vs drab

drabness and drab both are nouns.

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

drabness (noun)	drab (noun)
having a drab or dowdy quality; lacking stylishness or elegance	a dull greyish to yellowish or light olive brown

drabness (adjective)	drab (adjective)
	of a light brownish green color
	lacking brightness or color; dull
	causing dejection
	lacking in liveliness or charm or surprise