Ekco rhymes with:
alleco, breco, buteco, canseco, cogeco, coleco, creko, dececco, deco, delgreco, dicecco, echo, eko, el-greco, enseco, gecko, gekko, grecco, grecko, greco, hecco, krecko, minpeco, mlecko, noreco, pacheco, seco, seko
Ekco sounds like:
e's, each, eachus, eakes, easco, ease, eases, eash, easy, easy's, eaux, echo, echo's, echoes, echohawk, echohawk's, echos, eck, eckes, eco, eeg, ege, egg, egge, eggs, ego, egos, eich, eick, eiichi, eiji, eike, eis, eisa, eisai, eishi, ek, eka, eke, ekeus, ekk, eko, eos, eos's, es, esau, esch, esche, eschew, eschews, esco, escoe, escue, esh, eskew, eskey, esque, ess, essa, essay, essays, esse, esses, essex, essex's, essick, essie, essig, esso, ewes, ewig, ex, excess, excesses, excise, excises, exco, excoa, excuse, excuses, exec, execs, exes, eye's, eyes, eyes', ezoe, ezzo