darned vs blasted

darned and blasted both are adjectives.

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

As adjectives, darned and blasted are synonyms defined as:

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

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