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.
presidia praesidia presidio preside pressed prest prussiate pursed prosed prised prized parsed priced purest priest preset prosit presto prosciutti proceed prissed perused pierced praised pursued poorest peracid prosody precede pursuit porosity parasite hyperacid parricide periostea prost prosciutto purist
praesidia presidia residua miracidia presidio
pares peres pores prees presa prese press preys pries pyres apres