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.
frere frore firer farer freer frier fuhrer fearer fairer farrier fuehrer furrier fierier firrier farriery furriery friar furor friary furore varier verier
frere dearer gorier carrier wearier aerier queerer bearer tearier marrier hurrier learier beerier fairer farrier firrier searer curer merrier borer burrier burier furrier moorier ruer lurer courier harrier charier sheerer cheerer wirier warier torero tarrier direr surer soarer rearer fuehrer career sharer trier drear sorrier purer burrer orrery verier parrier hirer pourer fierier brier arrear hearer firer frier nearer varier airier wrier barer mirier currier serer freer fearer barrier derriere leerier jeerer merer terrier rear querier eerier wirer corer quarrier marrer farer crier carer prier hoarier poorer hairier parer airer rarer sourer drier truer shearer fuhrer charrier roarer sorer darer dourer tearer tourer wearer worrier cheerier yarer
fer ferry furrowy froe free frae fore firry fire fiery feriae faerie feria fere farrow fare faery furrow furry