Willapa's rhymes with:
chiapas', papas, aliquippa's, aliquippas, bumpas, chiapas', copas, hietpas, kopas, pampas, papas, petipa's, serpas, skippa's, tampa's, tenpas, zappa's
Willapa's sounds like:
wallabies, wallops, wheelbase, wolf's, wolfe's, wolves