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.
rampole rimple rumple rumply reemploy
rampole impale temple maypole ample ampoule ampule empale maple pimple compile rimple rumple sample semple simple dimple wimple
ramp cramp crampy gramp grampa tramp trampy