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.
pleach plash plashy plush palish plushy polish
bleach pleach leach clach slatch laich latch leachy leash lech leech letch belch fleche fleech fletch halacha caleche klatch loach welch
plea pilaw pule palea paleae peal pele pilau pale pilea pile pilei play plew plie pole pula splay