I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
whops whoops wops whips whaps whups woops whoopees whoopies whaups wheeps waps whipsaw weeps wipes weepies
whops hops shops chops ops lopes whups hyps copes cops copse coups goops coops kops chips wops poops fops ropes hyssops sops dopas topes topos whaps whoops ships bops pops popsy loups loops lops mopes haps knops opes opus roups oops soaps biopsy hopes dopes topis tops whips hips hoops woops chaps popes mops soups
whop wop whap whip whippy whoop whoopee whoopie whup swop