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.
treks dreks turks tracks drecks trokes trucks traiks taroks troaks trocks trikes tricks troikas turkois torques tricksy turkeys trugs dirks trogs darks dregs trigs torcs dorks torics tragus drakes trigos drouks triacs tarocs darkeys teargas darkies turacos drogues terraqueous derricks druggies touracos turacous turquois turquoise
dreks treks breeks recks forks wrecks araks wreaks markas murks merks parkas perks quarks regs sarks groks creaks darks carks dorks phreaks dregs irks taroks turks works charks sharks shrieks reeks burkes larks corks borks birks breaks lurks mirks marks narks kirks parks quirks barks porks creeks zerks jerks dirks freaks drecks harks recs burkas berks arks warks charkas chirks shirks yerks
trek drek trike troke turk turkey streak streaky streek