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.
trust truest trusty trustee tryst tryste triste turista tourist trussed torosity tarriest touristy teariest tourista durst drest driest direst truced tercet dearest diarist dourest torsade tressed
rust trust crust jurist tryst arrest merest querist erst fairest first aurist forest frusta verset verste horste curst sheerest karst poorest burst prost purist rearrest serest sourest dearest direst drest tourist rest aorist worst rusty grist verist queerest barest crest roust frost crusty verst wrist horst hurst corset cruset wrest lyrist truest airest nearest prest purest rarest searest sorest surest diarist dourest durst trusty worset wurst yarest
truss trass trues truce trousseau tressy tress tres druse tars torso torsi torse tors terse tarsi torus