THESAURUS
agential, agentival, agentive, arbitrational, arbitrative, assisting, coming between, conducive, employable, facilitating, favoring, forwarding, going between, handy, helpful, instrumental, intercessional, intercessory, interlocutory, intermedial, intermediary, intermediate, intermediatory, intervening, interventional, mediative, mediatorial, mediatory, mesne, middle, ministerial, ministering, pacificatory, promoting, serviceable, subservient, useful
