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.
preact precut porrect hyperacute pricket precode parquet hyperacuity paraquat parakeet paroquet parroket paraquet parkette parrakeet perked porked parked parkade percoid peruked pricked prigged progged parakite preguide
react preact recta recti recto recut bract erect fracti coerect correct porrect precut reerect direct tract