We don't have synonyms for yours yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are your, tours and pours.
(n) :
that which belongs to you; the possessive second person pronoun used without a following noun; yours sincerely, Yours faithfully, Yours, Sincerely yours
(n) :
that which belongs to you; the possessive second person pronoun used without a following noun; yours sincerely, Yours faithfully, Yours, Sincerely yours