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.
pearler pearlier parlor parlour prowler
pearler frailer whirler trailer surlier earlier nearlier gnarlier quarreler curler crawler coruler caroler girlier hurler furler railer realer burlier burler brawler birler ruler curlier marlier knurlier parlor pearlier drawler trawler whirlier
pearl pearly parlay parle parley parol parole parolee peril perilla