naught vs aught

naught and aught both are nouns.

Word	Noun	Adjective	Verb	Adverb
naught	Yes	No	No	No
aught	Yes	No	No	No

As nouns, naught and aught are synonyms defined as:

naught and aught: a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

Other synonyms of naught include cipher, cypher, goose egg, nada, nil, nix, nothing, null, zero, zilch, zip, zippo.

naught (noun)	aught (noun)
complete failure	a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential
a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential