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.
perdu perdue perdy period perdie peered pert prod peridia pard priedieu peart proud pored pared preed pardy pried pruta purda pardi parred purred pardie purdah prutah pardah poured parody pardee paired periti pureed parodoi parried pierrot yperite part port prat
perdu queered sheered weird sered perdy perdue peered nerdy nerd merde leered jerid beard jeered herd heard vertu veered cered tiered cheered sherd
per pear peer peerie peery pere perea pereia peri perry pier aper apery opera