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.
replays repels repeals replace replies replows repolls repulse reapplies rappels ripples
plays byplays replays splays pleas ploys polys hooplas copulas cupolas deploys whooplas
replay repeal repel replow reply repoll