Catsup rhymes with:
ketchup, ketchup, catchup, ketchup, matchup, allsup, alsup, archbishop, autoeurope, balthrop, bearup, billup, bishop, biskup, borup, burnap, canupp, catchup, cresap, cullop, delap, delapp, develop, dollop, ejup, envelop, europe, fillip, fulop, gallop, gallup, gawthrop, gilstrap, gossip, harrop, heslop, hiccough, hiccup, hislop, hodapp, holtrop, hyslop, hyssop, jessop, jesup, julep, ketchup, kladstrup, konop, lathrop, lookup, lothrop, matchup, mckillip, mckillop, mixup, moulthrop, northrop, northrup, philip, phillippe, polyp, pratap, prokop, proto-stirrup, puusepp, redevelop, scallop, soukup, stanhope, stirrup, sukup, sunup, syrup, tellep, thorup, tulip, turnip, underdevelop, waldrep, waldrip, waldrup, wallop, westrup, winthrop, witkop, wittkopp, worship, wrapup