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.
peaty peat paty piety patty petty pet pat poet pity pate petti paddy putty petto potty pouty pieta ptooey payday pattie pattee ped pit pad put pot padi paid peed pied pita pout ptui putt
peaty meaty eat gnatty peat reata ratty petty paty fatty heady beady patty beat beaut neat seat deity teat chatty beauty batty bawty netty tatty catty moiety satay ready jetty piety suety feat wheat matey natty heat meat leady laity gaiety cheat