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.
limpa limp lamp lump lumpy
limpa imp impi gimp gimpy jimp jimpy guimpe limp oompah pampa pimp simp wimp wimpy chimp
lima limo slime glime glim clime climb blimy blimey limy limey limb lime limby limbo limbi limba slim slimy