Kastl rhymes with:
apostol, austell, austill, baudendistel, bestul, bicoastal, bristol, castel, castell, christal, christel, chrystal, coastal, cristal, crustal, crystal, distal, distel, dostal, estel, estell, feustel, forrestal, gerstel, gestal, hornbostel, hostel, hostile, kastel, kestel, kostal, kristall, kristol, krystal, mastel, mccrystal, pedestal, pentecostal, pistil, pistol, postal, postel, postell, schoffstall, trostel, tunstall, vestal, westall, worstell
Kastl sounds like:
kadel, kastel, kastle, keadle, keathley, keatley, keidel, keitel, keithley, keithly, kestel, ketola, kettell, kettle, kettlewell, kiddle, kidwell, kittel, kittell, kittle, kostal, kotila, kotula, kudla, kudlow