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.
color colour couloir clour coiler coaler calory cooler colure collar calorie coalier collier colliery collyria clary clear glory caller culler galore gaoler gloria
color dolor jailor calory clour colour couloir gaoler volar poler pillory pylori solar valour sailor dolour tolar wooler molar valor velour cooler lory flour flora floor bolar bailor pooler fluor lour galore glory pallor polar lore tailor tooler choler
col calo coyly coulee cloy coal coala coaly coil cola cole collie colly coly cool coolie coolly cooly cowl kolo