pudendum vs private parts

pudendum and private parts both are nouns.

Word	Noun	Adjective	Verb	Adverb
pudendum	Yes	No	No	No
private parts	Yes	No	No	No

As nouns, private parts is a hypernym of pudendum; that is, private parts is a word with a broader meaning than pudendum:

Other hypernyms of pudendum include crotch, genital organ, genitalia, genitals, privates.

pudendum (noun)	private parts (noun)
human external genital organs collectively especially of a female	external sex organ