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.
refer reefer reefier referee reifier reoffer refry rifer revere reaver revery reiver refire roofer riever reverie raver river rover riviera rougher
liefer refer defer reefer chiefer fer iffier puffer offer fifer lever never puffier niffer miffier riever kefir puffery gofer fear zaffer chafer sever differ wafery chuffer chauffeur chaufer chaffer woofer whiffer defier roofer duffer gaffer reifier piaffer daffier suffer liever ever deffer feoffer laveer fere goofier coffer hoofer gauffer veery veer wafer buffer buffier lifer deafer knifer leafier beefier heifer quaffer goffer loafer fever doffer deifier soever huffier safer weever refry reoffer reefier coiffeur chaffier chauffer rifer whoever chuffier
ref reef reefy reeve reif reify rife rereview tref trefah