Source : Webster's Revised Unabridged Dictionary (1913)

Monarchial \Mo*nar"chi*al\, a.
   Monarchic. --Burke.

Source : WordNet®

monarchial
     adj : of or relating to or befitting a monarch or monarchy;
           "monarchal (or monarchical) government"; "a country
           that was monarchial in tradition"; "reconciled to
           monarchic rule"; "monarchical systems" [syn: {monarchal},
            {monarchic}, {monarchical}]