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.
corsair crosshair crazier gorsier coarser courser creasier curser creaser cruiser crasser grazier coercer caresser cruzeiro grassier greasier crozer cursor grazer crosier crosser crozier cursory greaser
corsair bursar bursary horsier crosshair gorsier pursier sarsar tarsier
cors coarse coirs cores corse course