Castelo rhymes with:
castello, costello, stello, botelho, botello, buentello, castello, civitello, costello, martello, militello, montello, otello, piscitello, pocatello, sotello, sotelo, stello, tello, vitello
Castelo sounds like:
caddell, cadell, cadle, cadwell, casteel, castel, castell, castellaw, castelli, castello, castilla, castille, castillo, castle, 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