infernal vs goddamn

infernal is a noun but goddamn is not a noun.

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

As adjectives, infernal and goddamn are synonyms defined as:

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

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

infernal (adjective)	goddamn (adjective)
being of the underworld	used as expletives
characteristic of or resembling Hell	expletives used informally as intensifiers
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

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