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.
burrer burrier burier barrier burgher barer borer brier bearer briery briar briary beerier
burrer marrer eerier horror beerier jeerer leerier mirier quarrier burier corer hirer curare farrier rarer harrier firrier carer barer fairer crier brier barrier furrier merer frere frore borer rare burrier roarer darer sheerer sharer sorer cheerer charier tarrier wirier wearier direr warier truer terror serer tourer querier tearier parrier drear orrery prier currier moorier poorer sourer bearer fierier verier carrier error varier hairier marrier fuhrer courier crore arrear firer airier fearer hearer purer lurer hurrier farer fuehrer furore wrier ruer merrier airer freer gorier frier career learier curer hoarier searer queerer sorrier parure mirror rear pourer nearer dourer parer tearer aerier torero terrier rearer trier urare dearer wearer wirer drier worrier charrier soarer cheerier shearer surer yarer
burr burry burrow burro brr bur bura borrow birr burgh bureau berry buhr brrr bourree barrow barrio barre bury