Uarco rhymes with:
anadarko, arco, arko, asarco, barco, barko, barkow, calarco, comarco, darco, delbarco, demarco, dimarco, marco, marcoe, marko, markow, narco, sammarco, trimarco, varco
Uarco sounds like:
uhrich, uhrig, urge, urges, urgo, uri's, urias, uric, urich, urick, uriegas, urquiza, ursa, ursie, urso, ursus, ursy, uruguay, uruguay's