sweet Fanny Adams vs naught

sweet Fanny Adams and naught both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweet Fanny Adams	Yes	No	No	No
naught	Yes	No	No	No

As nouns, naught is a hypernym of sweet Fanny Adams; that is, naught is a word with a broader meaning than sweet Fanny Adams:

sweet Fanny Adams: little or nothing at all
naught: a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

Other hypernyms of sweet Fanny Adams include aught, cipher, cypher, goose egg, nada, nil, nix, nothing, null, zero, zilch, zip, zippo.

sweet Fanny Adams (noun)	naught (noun)
little or nothing at all	complete failure
	a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential