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.
poesies posies poussies psis pussies possess pesos poses poises posses poaceous puces pisos pases paces puses psoas passus passes paisas pisses peises peaces peases pauses pieces pusses paseos piceous
kneesies poesies eses busies noesis nesses bossies loesses missies leses pussies messes newsies resews cesses sassies daisies diesis tassies cheeses yeses posies easies hissies poussies fesses lassies gussies hussies jesses beses cosies resees esses guesses resize cissies sissies dassies dioecies wussies chesses yesses sis