Grackle rhymes with:
crackel, crackle, racal, rachal, cackle, crackel, crackle, hackel, hackl, hackle, jackal, jackel, jakel, kachel, mackall, mackel, racal, rachal, shackle, tackle, unshackle, yackel, yakel
Grackle sounds like:
garagiola, gargill, gargiulo, gargoyle, garguilo, gergel, gergely, gracile, graciously, graessle, grassel, grassl, grassley, gressley, grigoli, grisly, griswell, grizzell, grizzle, grizzly, grossly, grygiel, guariglia, gurgle