Grouper rhymes with:
trooper, blooper, cooper, duper, hooper, kuiper, kuper, kupor, looper, luper, pooper, scooper, stupar, stupor, super, trooper
Grouper sounds like:
garber, garver, geographer, gerber, grabber, graber, graeber, graper, graver, greber, greever, grever, griever, grober, groover, gropper, groupware, grover, gruber, gruver