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.
parlor parlour pearler pearlier prowler
parlor birler burler furler hurler curler parlour pearler whirler
parlay parley parle pearly purlieu purl prole prill prelaw payroll pearl parrel parral parolee parole parol sparely