Unesco rhymes with:
glasgow, moscow, watsco, abaco, aeromexico, agco, agnico, armco, 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, warnaco, watsco, woolco, zydeco
Unesco sounds like:
umansky, umass, unanimous, unease, uneasy, ung, ungo, unhinge, unhook, unigesco, union's, unionize, unions, unions', unique, unisex, unisys, unisys', unisys's, unix, unmanage, unmask, unos, unwise, unz