Castorena rhymes with:
adorna, barna, berna, cerna, corna, diperna, lavorgna, lorna, materna, merna, morna, norna, orna, palmstierna, sarna, serna, taverna
Castorena sounds like:
cadrone, caterino, catharine, catherina, catherine, catherman, catron, cauthorn, cawthorn, cawthorne, cdrom, cedrone, chadron, chesterman, cistern, citrano, citrin, citrine, citroen, citron, cothern, cothran, cothren, cothron, cotrone, cotroneo, cotterman, cutrona, cutrone, cutworm, cydrome