Armco rhymes with:
primeco, simcoe, abaco, aeromexico, agco, agnico, atico, barinco, calico, chico, coco, d'amico, flamenco, glasgow, guanaco, homedco, hurco, interco, ivaco, jericho, jerrico, kinko, larco, lifeco, litco, medico, mexico, miyako, monaco, moscow, new-mexico, politico, portico, primeco, rococo, servico, simcoe, tobacco, unesco, warnaco, watsco, woolco, zydeco
Armco sounds like:
aaron's, aarons, aeriens, aeromexico, aeromexico's, ahrens, airing, airman's, airwing, airwings, aramco, aramis, arango, aransas, aranyos, arena's, arenas, arens, arenz, arianna's, arm's, armas, armco's, armenia's, armenians, armes, armey's, armies, armijo, arming, armonk, arms, army's, arnaz, arnox, arns, aromas, arons, arrange, arranges, arraying, awareness