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.
tirades trades triads treads triodes traduce turds trets traits tortes dreads treats tortas teredos derates toroids dirties terrets derides turrets dorados tardies druidess hydrides treaties hydrates deaerates dirts torts drats trots tarts derats droids druids tarots trouts hydrids territs
irades tirades parades charades grades corrades trades rads weirdoes birdies oreads hardies reads carates borates hurdies rates phorates aerates braids parados haeredes borides bredes bourrides brads bardes urates derides treads pirates gyrates hydrides dreads gourdes deaerates hayrides narrates breads crudes corrodes karates grads hordes readies grates redes crates broads frauds rodes ferrates farads byroads brides rides marauds curates merdes roads roadeos rereads irides raids prides burdies orates fordoes sarodes joyrides myriads berates roadies perdues heredes gradus cerates prudes prates derates dorados hydrates tardies erodes triads weirdies serrates grides
tirade trad tired trade tread triad titrate