Tanzanian rhymes with:
albanian, arslanian, aslanian, bahrainian, hovnanian, jordanian, lithuanian, mediterranean, o'hanian, ohanian, panamanian, pennsylvanian, pomeranian, romanian, rumanian, stepanian, subterranean, tasmanian, ukrainian, vartanian
Tanzanian sounds like:
tangeman, tangen, tangney, tanguma, tankan, tanzania, temkin, teng-wen, tennessean, tennison, tennyson, tension, thinkin, thinkin', thomasina, thomasine, thomason, thomassen, thomasson, thomison, thomsen, thomson, tianjin, timken, timson, tingen, tinkham, tinsman, tomasina, tomasine, tomasini, tomasino, tomkin, tomson, tonkin, tonnesen, townsman, townson, tunisian, tunison, twonshein