We don't have synonyms for zomby yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are zombi, womby and zomb.
(n) :
(rare) Nonstandard spelling of zombie. [(voodoo, horror) A person, usually undead, animated by unnatural forces (such as magic), with no soul or will of his or her own.]
(n) :
(rare) Nonstandard spelling of zombie. [(voodoo, horror) A person, usually undead, animated by unnatural forces (such as magic), with no soul or will of his or her own.]