We don't have synonyms for impire yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are impure, empire and umpire.
(n) :
Obsolete form of empire. [A political state, often a monarchy, that has achieved a much greater current size than its initial size by conquering surrounding territories, cities or nations.]
(n) :
Obsolete form of empire. [A political state, often a monarchy, that has achieved a much greater current size than its initial size by conquering surrounding territories, cities or nations.]