goddam vs dirty word

goddam is not a noun while dirty word is a noun.

Word	Noun	Adjective	Verb	Adverb
goddam	No	Yes	No	Yes
dirty word	Yes	No	No	No

goddam (noun)	dirty word (noun)
	an offensive or indecent word or phrase
	a word that is considered to be unmentionable

goddam (adjective)	dirty word (adjective)
expletives used informally as intensifiers

goddam (adverb)	dirty word (adverb)
expressing anger, despair, frustration, approval, or surprise