goddamn vs infernal

goddamn is not a noun while infernal is a noun.

Word	Noun	Adjective	Verb	Adverb
goddamn	No	Yes	No	Yes
infernal	Yes	Yes	No	No

As adjectives, goddamn and infernal are synonyms defined as:

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

goddamn (noun)	infernal (noun)
	an inhabitant of Hell

goddamn (adjective)	infernal (adjective)
used as expletives	being of the underworld
expletives used informally as intensifiers	characteristic of or resembling Hell
	of or pertaining to or characteristic of a very uncontrolled and intense fire
	expletives used informally as intensifiers
	extremely evil or cruel; expressive of cruelty or befitting hell

goddamn (adverb)	infernal (adverb)
expressing anger, despair, frustration, approval, or surprise