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.
jalap jalop jalopy jaloppy julep
jalap alp lap slap leap beleap flap jalop clap galop kalpa palp palpi salep salp salpa palapa dewlap