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.
righto right righty wright wrought rift refit rivet roughed
righto hight taught sought wrought righty right nighty naughty ought naught knight mighty might light weighty waught ghat fought paughty weight tight dight sight wright caught nought photo night aught bight eight eighty fight wight