Mumper rhymes with:
bumper, dumper, jumper, lumper, stumper, thumper, bumper, burkemper, camper, damper, distemper, dumper, gamper, hamper, jumper, kamper, kemper, lumper, pamper, pomper, samper, scamper, shrimper, simper, smokejumper, stamper, stemper, stumper, swamper, tamper, temper, thumper, tremper, whimper
Mumper sounds like:
maberry, mabery, mabrey, mabry, maneuver, manfra, manfre, manpower, mayberry, maybury, mayfair, mbira, member, mooberry, mover, mowbray, muhabara, mumphrey, mumpower