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.
pieties pities pietas pits pets potties poetise patties putties poetess poetize peats pates pitas pedes poets pitsaw pittas petsai piteous paddies puttees pots pats peds puts padis patsy potsy pouts putts patois potsie pottos
gaieties pieties reties moieties ties poetise pities catties butties metes patties etuis beauties cutties fatties beedies jetties potties booties cities dauties deities duties tides tutties chitties betise laities metis bawties poetize putties fetes fouettes vetoes jetes poetess cooties footies hotties kitties jutties cuties cetes sties dawties ditties tatties titties whities yetis tis
petti pieta piety pipet pipette pet pit