We don't have synonyms for thank-yous yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are think, tank and shank.
(v) :
(transitive) To express appreciation or gratitude toward (someone or something).
(v) :
(transitive) (figurative) To respond to (someone) out of, or as if out of, appreciation or gratitude.
(v) :
(transitive) (figurative) Chiefly followed by for: to credit or hold (someone or something) responsible, especially for something negative; to blame.
(v) :
(transitive) In the future tense in the form one will thank someone to do something, chiefly expressing a command or criticism: to request that (someone) do something.
(v) :
(transitive) (rare) To express appreciation or gratitude for (something).
(v) :
(intransitive, obsolete) To express gratitude.
(v) :
(transitive) To express appreciation or gratitude toward (someone or something).
(v) :
(transitive) (figurative) To respond to (someone) out of, or as if out of, appreciation or gratitude.
(v) :
(transitive) (figurative) Chiefly followed by for: to credit or hold (someone or something) responsible, especially for something negative; to blame.
(v) :
(transitive) In the future tense in the form one will thank someone to do something, chiefly expressing a command or criticism: to request that (someone) do something.
(v) :
(transitive) (rare) To express appreciation or gratitude for (something).
(v) :
(intransitive, obsolete) To express gratitude.