What is another word for "iota"?

Roget's Thesaurus (1911) lists these synonyms for "iota": absence, any, cipher, drop, egg, goose, hair, hide, hint, jot, naught, neither, never, nix, nixie, nobody, none, nor, not, nothing, nought, nul, null, one, shadow, soul, speck, suspicion, trace, vive, void, whit, zero, zip.