Amalgamate rhymes with:
acclimate, automate, decimate, glucosamate, glutamate, overestimate, underestimate, acclimate, automate, breakmate, checkmate, classmate, decimate, dichromate, glucosamate, glutamate, inmate, multimate, overestimate, papermate, phonemate, playmate, primate, roommate, schoolmate, shipmate, shoemate, shumate, stalemate, teammate, underestimate, unimate