Namibia rhymes with:
libya, tibia, agoraphobia, albea, arabia, arencibia, betabia, cancerphobia, claustrophobia, cobia, colombia, columbia, escambia, fabia, gambia, gebbia, homophobia, libya, lobbia, phobia, robia, rubbia, rubia, sabia, sarabia, senegambia, serbia, suburbia, tibia, tobia, xenophobia, zambia, zenobia, zubia
Namibia sounds like:
naab, nab, nabb, nabi, nabob, naef, naeve, naff, naify, naive, nambi, namphy, nanobaby, nap, napa, napea, napp, nappa, nappi, nappo, nav, nava, nave, navy, neave, neeb, neef, neff, nepa, nephew, neuhoff, neva, neve, neveau, neveu, newbie, newby, newwave, nib, nibbe, niehoff, nimby, nineveh, nip, nipp, nippy, nobbe, nobuo, nope, nouveau, nov, nova, novey, novi, novia, novo, novoa, novy, nub, nuevo, numb, nuova, nuovo, nymph