naught vs zilch

naught and zilch both are nouns.

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

As nouns, naught and zilch are synonyms defined as:

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

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

naught (noun)	zilch (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