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