dirty word vs profanity

dirty word and profanity both are nouns.

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

As nouns, profanity is a hypernym of dirty word; that is, profanity is a word with a broader meaning than dirty word:

dirty word (noun)	profanity (noun)
an offensive or indecent word or phrase	vulgar or irreverent speech or action
a word that is considered to be unmentionable