zilch vs zippo

zilch and zippo both are nouns.

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

As nouns, zilch and zippo are synonyms defined as:

zilch and zippo: 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, naught, nil, nix, nothing, null, zero, zip.

zilch (noun)	zippo (noun)
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