We don't have synonyms for excarnation yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are incarnation, excavation and carnation.
(n) :
The burial practice of removing (or causing to be removed) the flesh and organs of the dead, leaving only the bones, especially the practice of laying out corpses for vultures to strip bare.
(n) :
The burial practice of removing (or causing to be removed) the flesh and organs of the dead, leaving only the bones, especially the practice of laying out corpses for vultures to strip bare.