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.
praesidia presidia presidio preside pressed praised peracid parasite prest prussiate hyperacid parsed prised prosit presto purest priest priced pursed prosed prized preset prosciutti pursued proceed prissed prosody poorest perused precede pierced pursuit persuade porosity parricide prost prosciutto
praesidia presidia residua presidio