zilch vs naught

zilch and naught both are nouns.

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

As nouns, zilch and naught are synonyms defined as:

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

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

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