Castle rhymes with:
cassel, cassell, kasel, kasell, kassel, kastle, astle, basle, brasel, brasil, brassell, cassel, cassell, facile, gracile, grassel, grassl, hassel, hassell, hassle, kasel, kasell, kassel, kastle, tassel, vantassel, vantassell, vassal, vassel
Castle sounds like:
caddell, cadell, cadle, cadwell, casteel, castel, castell, castellaw, castelli, castello, castelo, castilla, castille, castillo, catelli, cathell, cattell, cattle, caudal, caudell, caudill, caudillo, caudle, cedillo, chadel, chadli, chadwell, chattel, chatwal, cheadle, cheetal, chikatilo, chotilla, citadel, coastal, coattail, cocktail, coddle, cogdell, cogdill, costella, costello, costilla, costilow, costley, costlow, costly, cotelle, cotilla, cottle, cuddle, cuddly, custodial, cutillo