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.
collar collier claro clary clear color colliery collyria culler cooler colour colure coaler caller coiler coalier couloir clour glary glair glare gular calory gaoler glaire glairy killer calorie gallery queller galleria
pillar collar dollar cellar lar caller clear dialler alary volar phyllary foliar blare flair fuller lear lair liar clary biller fueller holler giller malar sheller mylar willer tolar siller loller molar filler filar pallor glair alar poller roller salary dueller huller blear luller claro hilar faller gular teller phylar flare feller heller lari bolar iller glare baller velar killer hiller talar solar miller muller knoller pilar polar queller puller culler seller glary duller taller tiller toller chiller yeller
collie colly col cool cully coly cull cole cowl cola cooly coil coolie coala coaly coal callow callee calla call coolly coulee coyly cullay golly