cumbersome vs cumbersomeness

cumbersome is not a noun while cumbersomeness is a noun.

Word	Noun	Adjective	Verb	Adverb
cumbersome	No	Yes	No	No
cumbersomeness	Yes	No	No	No

cumbersome (noun)	cumbersomeness (noun)
	trouble in carrying or managing caused by bulk or shape

cumbersome (adjective)	cumbersomeness (adjective)
not elegant or graceful in expression
difficult to handle or use especially because of size or weight