Groppy's rhymes with:
copies, poppies, poppy's, burpees, cappy's, copies, espy's, groupies, guppies, herpes, hippies, krispies, mapi's, mississippi's, mississippis, philanthropies, photocopies, poppies, poppy's, puppies, recipe's, recipes, sharpies, sharpy's, therapies, tippy's, yuppies
Groppy's sounds like:
garbacz, garbage, garp's, garps, gearbox, gearboxes, geographic, geographic's, gerbasi, gerbig, gervais, gervase, gervasi, gervasio, giraffes, graboski, grabowski, grabs, grabski, graffius, grapage, grapes, graphic, graphics, graphics', graphs, graves, graves's, gravies, gravois, grbavica, greaves, grieves, grievous, griffey's, griffis, gripes, grips, grivas, grooves, group's, groupies, groups, groups', grove's, groves, grubaugh, grubbs, grubs, gurevich