Greek -αρχία (-arkhía, “-archy: rule”). <span class="searchmatch">binarchy</span> (plural not attested) (obsolete) Synonym of biarchy. "†'<span class="searchmatch">binarchy</span>, n.", in the Oxford English Dictionary...
<span class="searchmatch">binarchy</span> From bi- + -archy. biarchy (countable and uncountable, plural biarchies) Synonym of diarchy: rule by two people. An alliance of two countries...
English terms suffixed with -archy anarchy anthroparchy autarchy biarchy <span class="searchmatch">binarchy</span> chiliarchy cryptarchy decadarchy decarchy dekadarchy demarchy diarchy dodecarchy...