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.
pourer purer poorer parer prier parure pareira parrier prior parura priory prairie
curer purer lurer sourer surer dourer pourer tourer carrier burrer barrier hirer sorer barer gorier fairer tearier eerier career marrier farrier freer serer rarer merer merrier harrier airier tarrier bearer fuhrer varier hoarier direr sheerer sharer cheerer charier wirier wearier warier trier fierier drear darer furrier rear fuehrer moorier parrier prier quarrier hairier hearer roarer firrier airer orrery marrer courier farer corer carer rearer burrier jeerer beerier torero querier parer soarer leerier fearer ruer wrier juror borer firer searer crier learier queerer frere aerier dearer furor burier hurrier currier parure nearer aurar verier sorrier mirier poorer brier arrear drier tearer terrier frier truer wearer wirer worrier charrier cheerier shearer yarer
pour pur poor poori pore pure puree puri purr aporia spore spur spurrey spurry