Okpo rhymes with:
acampo, alpo, bacigalupo, bontempo, burpo, cacioppo, campo, cantalupo, capo, cappo, conasupo, contempo, crespo, crispo, cupo, defilippo, delcampo, depo, depot, difilippo, episcopo, expo, filippo, firpo, flippo, gestapo, grippo, grupo, gruppo, harpo, hippo, hypo, kimpo, lampo, leppo, lippo, lupo, nappo, o'campo, obispo, ocampo, piscopo, pupo, repo, restrepo, sanfilippo, stumpo, swapo, tampopo, tipo, typo, zippo
Okpo sounds like:
o'keefe, o'keeffe, occupy, ojibwa, okabe, okeechobee, okeefe, okeeffe, okubo, osby, oshaf, ossify, ouseba, oxbow