Soper rhymes with:
choper, hoeper, kloepper, koper, loeper, loper, roeper, roper, sloper, alper, asper, bagpiper, beekeeper, beeper, blooper, bookkeeper, bopper, bumper, burkemper, buspar, cadiddlehopper, caliper, camper, caper, capper, carper, caspar, casper, cheaper, chipper, choper, chopper, clapper, clepper, clipper, clopper, colpepper, cooper, copper, cosper, cowper, crisper, cropper, crowkeeper, culpepper, damper, dapper, deeper, dekuyper, deschepper, desper, developer, diaper, dipper, distemper, doorkeeper, draper, dropper, dumper, duper, edper, esper, eyedropper, flapper, flipper, flypaper, gamekeeper, gamper, gaspar, gasper, gatekeeper, gipper, glasper, goalkeeper, gossiper, graper, grasshopper, gropper, groundskeeper, grouper, halper, hamper, handicapper, harper, helper, hepper, hesper, hipper, hoeper, hooper, hopper, housekeeper, hyper, improper, innkeeper, interloper, jamshedpur, jasper, jesper, jumper, juniper, kamper, kapor, kapper, kapur, kaspar, kasper, keeper, keiper, kemper, kerper, kidnapper, kieper, kiper, kipper, kippur, klapper, klepper, kloepper, knapper, knepper, knipper, koper, kopper, kuiper, kuper, kupor, kupper, kuyper, landscaper, lapre, lauper, leafhopper, leeper, leiper, leper, lepper, lepre, lipper, loeper, longpre, looper, loper, lumper, luper, mcpaper, minesweeper, mumper, napper, neeper, newspaper, nipper, opper, pamper, paper, paratrooper, pauper, peacekeeper, peper, pepper, pieper, piper, pomper, pooper, popper, proper, propper, prosper, pyper, raper, rapper, reaper, repr, ripper, roeper, roper, samper, sandpaper, sapper, scalper, scamper, schaper, scheper, schipper, schlieper, scooper, scorekeeper, scraper, scupper, sharecropper, sharper, shepper, shipper, shopkeeper, shopper, shrimper, simper, skipper, skyscraper, sleeper, slipper, sloper, smokejumper, snapper, sniper, stamper, starliper, steeper, stemper, stepper, stolper, stopper, storekeeper, streeper, striper, stripper, stumper, stupar, stupor, super, supper, swamper, sweeper, tamper, taper, tapper, temper, teper, tepper, thumper, tipper, topor, topper, torpor, trapper, tremper, tripper, trooper, trosper, tupper, upper, vanriper, vapor, varityper, vesper, viper, wallpaper, wastepaper, whimper, whisper, whopper, wiper, wolper, worshiper, wrapper, zipper
Soper sounds like:
saber, sabir, sabra, sabre, sabry, safari, safer, saffer, saffir, safier, safir, safire, safra, saphira, sapiro, sapper, sapphire, sapporo, sauber, savary, saver, savery, savier, savior, savir, savor, savory, savr, sbarro, schaber, schaefer, schaeffer, schafer, schaffer, schaper, schapiro, scheffer, scheiber, scheper, schieber, schiefer, schieffer, schiffbauer, schiffer, schipper, schober, schopfer, scooper, scupper, seaberry, seabury, seafarer, seapower, seaver, seber, sebree, seeber, seehafer, seever, seiber, seifer, sever, severa, severe, severer, sevier, sferra, shaber, shaefer, shaeffer, shafer, shaffer, shakespeare, shapero, shapira, shapiro, shaver, shawver, sheaffer, sheffer, shepper, shiffer, shipper, shiver, shober, shopper, shover, shufro, siberia, sieber, siever, siver, skipper, skiver, sober, sobibor, sofaer, sofer, soffer, soifer, soiffer, sopher, spahr, spar, spare, sparr, sparrow, spaur, spear, speare, speer, spehar, speier, speir, spera, spero, sperry, speyer, sphar, sphere, spier, spira, spire, spiro, spoarer, spohr, spoor, spore, sporer, sporrer, spray, sprayer, spree, sprehe, sprow, spry, spur, spurr, spurrier, subaru, suber, subpar, suffer, sufferer, super, superhero, superior, supper, supra, svoray, sweeper, sypher