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.
faller fuller filler feller fullery fueller filer fleer flier fleury fueler vealer valuer fouler feeler fowler failure vealier foolery flir valor fluor flair viler flare floor flour filar veiler floury florae flurry foliar valour volery filaree filaria filariae phyllary
baller teller muller poller feller luller chiller loller queller taller culler fuller iller dueller hiller duller holler dialler seller caller yeller sheller fueller knoller killer siller tiller puller heller huller toller giller willer filler faller biller miller roller taler gaoler fueler fullery viler dialer mailer jowlier oiler bolero collier railer mealier hellery bowler coalier ruler collar plier rulier hauler boiler paler foolery poler haler holier cellar healer ceiler bailer tailleur coiler shoaler sealer woollier cholera chillier wooler whaler wailer sealery leer eelier haleru wilier tallier fowler baler kneeler volery sailer relier miler gluer vealier celery raillery pallier dallier fleer millier heeler dealer galere jollier puler dueler helleri sillier peeler mewler lowlier coaler cooler tailer belier vealer pallor realer flier bawler howler feeler blear roilier lear hillier veiler sallier haulier rallier palier fouler gallery bullier jailer reeler pillar slier hailer mauler moiler dollar filer lier pooler bluer oilier shalier valuer tiler toiler tooler waler wheeler clear woolier lehr nailer choler shellier shoalier yowler
fall fallow fully folly foal filly fillo fille fill felly felloe fellow fellah fella fell feal faille fail follow full valley