Showboat rhymes with:
rowboat, towboat, ferryboat, flatboat, gunboat, houseboat, lifeboat, motorboat, powerboat, riverboat, rowboat, sailboat, speedboat, steamboat, towboat, tugboat
Showboat sounds like:
sabat, sabato, sabaudia, sabbath, sabta, safdie, safety, sapped, saputo, saved, savitt, scaffidi, scafidi, scoffed, scooped, scuffed, seabed, seafood, seeped, sepeda, sept, septa, sffed, shabad, shaft, shafted, shaped, shaved, shibata, shift, shifted, shifty, shipped, shopped, shoptaw, shoved, sift, sifted, sipped, skipped, skipwith, sobbed, sobota, sobotta, sociopath, soffit, soft, softwood, souped, soviet, spada, spade, spady, spaeth, spaid, spat, spate, spath, spayd, spayde, sped, speed, speeded, speedway, speedy, speth, spewed, spied, spieth, spit, spite, spoofed, spot, spoto, spotted, spotty, spout, spouted, spud, subbed, subdue, subdued, svoboda, swapped, swept, swift, swiped, swoboda, swooped