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.
patois pats patties padis pates patsy peats pities pottos poetise potties putties piteous paddies pieties pots puts pads pods pets pits poods pitas putts potsy poets pouts potsie pietas petsai pittas paydays poetess poetize puttees paduasoy
patois tis cutis lottos gaieties taos kotows reties quoits toys catties pities jetties toes buteos rotis fatties tows potties toss kitties cities geoids ties voids loids tatties hyoids duties whities tutties sties toits titties mitis titis zitis patties setose dittos ottos dauties deities ghettoes datos putties stoss photos mottoes etuis cooties butties metis satis jutties cutties pottos cuties booties rotos betise jatos lotos poetise laities ketose autos riotous coatis beauties kowtows footies kotos hotties vetoes moieties pieties bawties stows ratos dattos mottos ditties dawties tuis doits setous zooids tattoos tits ghettos tods tots stoas tuttis chitties tatsoi yetis
pat pate pattee pattie patty paty peat peaty ptooey spat spate