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.
pyrrol pyrrole pyrola payroll prole prowl parol parole parral parrel parolee purl prill parle pearl peril prelaw perilla puerile purlieu
pyrrol caroli triol droll reroll corral prowl payroll parral roll barrel broil ferrel carol role roil carrel growl quarrel nerol neroli parol parole parrel prole pyrola pyrrole sorrel drool troll
parr parry perry purr pyre pyro