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.
parities parties purities parietes pyrites parts yperites parodies pretties prates prides priedieus pirates proteus peritus parrots parades pyritous paradise proteose proettes pards prats ports prudes pirouettes pardahs parodos perdues periods parados pierrots prods perdus purdas
ferities rarities charities parities purities verities forties pyrites rites cerites neuritis muriates variates reties iritis pretties cowrites parties sureties dirties ferrites verites varieties norites barites curites yperites writes rewrites frites seriates hearties sorties diorites treaties sorites shorties
parity part pardi pardie parried party peart periti purity pyrite apart sparid sprit sprite