Tasmanian rhymes with:
panamanian, romanian, rumanian, albanian, arslanian, aslanian, bahrainian, hovnanian, jordanian, lithuanian, mediterranean, o'hanian, ohanian, panamanian, pennsylvanian, pomeranian, romanian, rumanian, stepanian, subterranean, tanzanian, ukrainian, vartanian
Tasmanian sounds like:
tacoma, tajima, takashima, takashimaya, takayama, taken, takeshima, takin', taoism, tashin, tashjian, tasm, tasman, tasmania, tassin, tassone, tatsuno, tauzin, teason, techno, tecogen, teichman, teichmann, teigen, tejan, tejano, tejon, tessman, texan, texscan, tezeno, theisen, theism, theissen, thicken, thiesen, thiessen, thissen, thyssen, tieken, tieszen, tietjen, tigon, tijuana, tishman, tison, tognino, token, tokkin, tokuyama, toscanini, toscano, toughen, towson, toxin, tschumi, tsunami, tsuneo, tuchman, tuckman, tucson, tucuman, tudjman, tugman, tuscan, tuscany, twosome, tycoon, tyson