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.
flair flir filar flare flier foliar filaree failure filaria filariae floor flora velar volar flour fluor filer fleer phylar flurry feeler feller filler fleury florae faller fouler fowler floury fuller fueler foolery fueller fullery vealier velaria phyllary
lair flair glair lar collar lire clear alar claro flier jollier hillier roilier slier sallier couloir liar lier lear alary lira cellar coalier haulier dallier shellier chillier glare woolier tolar millier talar glaire plier phyllary malar gular pilar mylar foliar palier velar rallier lari belier blare flir blear phylar clary bolar sillier bullier rulier holier jowlier vealier liri volar solar flare salary eelier relier hilar polar pallier collier oilier pillar lowlier mealier filar glairy dollar tallier molar wilier woollier glary shalier shoalier
fail faille fila flaw flawy flay flea folia folio