Collapse rhymes with:
claps, elapse, flaps, lapps, laps, lapse, relapse, slaps, apps, cap's, capps, caps, chaps, claps, crapps, craps, elapse, flaps, gap's, gaps, japs, kappes, kaps, knapp's, lapps, laps, lapse, maps, naps, perhaps, raps, relapse, saps, schnapps, scraps, slaps, snaps, straps, taps, traps, wraps, yaps, zaps
Collapse sounds like:
calabasas, calbos, calebs, calf's, callebs, calliopes, calpis, calves, calypso, calypsos, celebs, celibacy, chalifoux, chaloupka, chlebowski, clabaugh, clabough, claps, claybaugh, cleavage, cleaves, cliff's, cliffs, cliffs', clips, cloves, clovis, club's, clubhouse, clubhouses, clubs, colbaugh, colbeck, colby's, colbys, collapses, coolbaugh, culvahouse, cyclops, cyclops's, czechoslovak, czechoslovakia, czechoslovakia's, czechoslovaks