Forrestal rhymes with:
apostol, hornbostel, pedestal, apostol, austell, austill, baudendistel, bestul, bicoastal, bristol, castel, castell, christal, christel, chrystal, coastal, cristal, crustal, crystal, distal, distel, dostal, estel, estell, feustel, gerstel, gestal, hornbostel, hostel, hostile, kastel, kastl, kestel, kostal, kristall, kristol, krystal, mastel, mccrystal, pedestal, pentecostal, pistil, pistol, postal, postel, postell, schoffstall, trostel, tunstall, vestal, westall, worstell
Forrestal sounds like:
firstly, forestall, fractal, freestyle