darned vs blame

darned is not a noun while blame is a noun.

Word	Noun	Adjective	Verb	Adverb
darned	No	Yes	No	No
blame	Yes	Yes	Yes	No

As adjectives, darned and blame are synonyms defined as:

Other synonyms of darned include blamed, blasted, blessed, damn, damned, deuced, goddam, goddamn, goddamned, infernal.

darned (noun)	blame (noun)
	a reproach for some lapse or misdeed
	an accusation that you are responsible for some lapse or misdeed

darned (adjective)	blame (adjective)
expletives used informally as intensifiers	expletives used informally as intensifiers

darned (verb)	blame (verb)
	attribute responsibility to
	put or pin the blame on
	harass with constant criticism