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.
peatier pettier pater peter patter petter pewter pitier puttier poutier pottier poetry pouter potter padder putter powter pottery padri pedro powder powdery
matier meatier peatier tier jettier latter batter beadier cattier metier baiter gater aider pottier cottier rattier rater satire dater sootier gnattier beater battier guttier puttier pettier watery shittier neater shadier chattier tattier wittier wheatear dottier waiter nattier coater titer matter tater patter rootier natter mater oater nittier goutier haughtier feater headier hootier pater zootier nettier hatter ratter boater later gaiter leadier dotier eatery seater fatter readier cater poutier phatter pitier knottier raider footier nuttier fattier eater ruttier hater tatter heater tuatera mitier water watter doughtier whitier chatter tauter cheater shatter bittier yatter
peat pattie peaty petti pat pet