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.
ratify ratafee ratafia reedify redefy
beatify beautify notify ratify citify deify tiff tivy edify caitiff codify modify motif nidify reedify stiff
rat radii trait rarity prat krait grat irate radio raid raita rate rato ratty reata retie riata roti braid brat bratty frat crate grate orate prate drat urate