We don't have synonyms for neighborer yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are neighbor, neighborly and neighbour.
(n) :
US standard spelling of neighbour. [A person living on adjacent or nearby land; a person situated adjacently or nearby; anything (of the same type of thing as the subject) in an adjacent or nearby position.]
(v) :
US standard spelling of neighbour. [(transitive) To be adjacent to]
(n) :
US standard spelling of neighbour. [A person living on adjacent or nearby land; a person situated adjacently or nearby; anything (of the same type of thing as the subject) in an adjacent or nearby position.]
(v) :
US standard spelling of neighbour. [(transitive) To be adjacent to]