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.
repeats repots reputes rapids
repeats peats pats pets poets chapatis cowpats tippets lappets spats moppets spaits pates patsy nepetas sippets pipets spates poppets tappets pupates whippets puppets chappatis
repeat reaped repaid repped creped prepaid