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.
limpet limped lamped limpid lumped lampad
limpet camped temped dumped romped pumped amped mumped kempt lamped compt compete comped coempt wimped whomped chomped tumped jumped moppet limped umped tempt tamped damped ramped lumped pimped gimped bumped empty vamped humped imped champed whumped chumped
limp limpa lamp lump lumpy blimp