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.
ferret ferrety fret ferried ferrite ferrate feared furred ferity fretty forrit frat fart frit fort vert forty fired vertu freed fared fruit fritt fruity veered verite verity faired foredo variety gheraoed
ferret barret garret terret turret ret burred gnarred tret terete surety pierrot parred buret treat birred warred cruet barred caret hereto fret territ furred greet arete shirred knarred carrot beret tarred worrit garred hereat curred great marred jarred rete whereto parrot chirred purred curet ferrety erred forrit whereat whirred charred churred yirred
ferry fer faerie faery farrow fear feirie fere feria feriae fiery firry furrow furrowy furry