Synonyms for Zilch:

adj.

zero (adjective)
naught.

n.

none, not a living soul, solitary, not a single, absence, no., no one. pip-squeak, shrimp, nebbish, important. nothing (noun)
nada, blank, nought, void, naught, zero, goose egg, zip.
zero (noun)
cipher, nothing, nil, aught, zero, nought, naught, dummy, void, nobody, blank, nullity.
zilch (noun)
cypher, nix, naught, aught, zip, nothing, nada, goose egg, zero, nil, cipher, null.

Other synonyms:

none, solitary, no one, pip-squeak, nebbish. shrimp. no..