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.
rashness reshines richness
lushness butchness richness muchness poshness suchness rashness gaucheness shines bushiness fishiness ashiness machines tetchiness chines washiness achiness pushiness mushiness shyness cushiness gushiness reshines itchiness patchiness bitchiness touchiness achenes shoeshines