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.
fritt frit fruit ferity fruity forrit fretty ferrite fart fort fret frat forty fried forte ferret verite verity ferrate ferrety ferried variate variety fard ford vert
britt fritt barite write writ rite riot verity brit cowrite grit curite merit parity purity yperite rewrite diorite territ trite chariot krait bruit burrito lariat ferrite forrit frit fruit verite heriot ferity crit gritty griot norite periti pyrite rarity cerite droit trait worrit charity