We don't have synonyms for incisior yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are incisive, incision and incisor.
(n) :
Alternative form of incisor, especially that of an animal [(anatomy, zootomy) A narrow-edged tooth at the front of the mouth of mammals, between the canines and adapted for cutting; in humans there are four in each jaw.]
(n) :
Alternative form of incisor, especially that of an animal [(anatomy, zootomy) A narrow-edged tooth at the front of the mouth of mammals, between the canines and adapted for cutting; in humans there are four in each jaw.]