obscenity vs Fanny Adams

obscenity and Fanny Adams both are nouns.

Word	Noun	Adjective	Verb	Adverb
obscenity	Yes	No	No	No
Fanny Adams	Yes	No	No	No

obscenity (noun)	Fanny Adams (noun)
an obscene act	nautical term for tinned meat
the trait of behaving in an obscene manner	little or nothing at all
an offensive or indecent word or phrase