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.
retried redried retired retread retard reuttered retreat reiterate retort rehydrate ritard redroot
tried retried dried guttered littered tread treed tired mitered catered nattered motored mattered nitride metered buttered outread pattered tutored neutered gettered shuttered tared chytrid chattered fettered puttered retired tittered waitered triad pottered trite stored stride tattered satyrid nitrid bittered stared retread matured trued loitered natured muttered metred outride attrite tyred attired lettered tarried battered nitrite cottered mitred uttered tottered teetered sutured storied reuttered jittered bettered watered hatred putrid featured petered chittered shattered redried yattered
retire retiree retore retro retry rewriter