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.
lipid lipide lipoid lipped loped lapped leaped looped lopped louped lept
lipid cupid tepid siped riped pied biped bipod vapid copied paid lipoid lipide opioid piped pipit poppied rapid repaid sapid spied wiped
lip lipa lipe lippy blip flip flippy clip slip slipe slippy