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.
truest trust trusty trustee tryst drest tarriest teariest triste tercet tryste driest direst truced dearest trussed tourist dourest tressed turista torosity tourista touristy durst traced triced diarist dressed tierced torsade terraced
truest verst eeriest trusty sorest crest rust rest furriest reset freest resat queerest merriest rusty fairest burst poorest curst firriest leeriest roust sheerest charriest weariest wriest rarest breast searest wurst priest tarriest prest resit dearest hoariest dourest crust driest mooriest sourest veriest wrest crusty nearest burriest erst reest merest goriest forest leariest barghest frusta arrest airest hurst serest trust aeriest fieriest airiest sorriest preset miriest drest cruset direst hairiest surest barest durst cheeriest presto wiriest rearrest beeriest purest teariest wariest chariest yarest
trues tressy stress tyres truss truce trousseau tries treys trews tress tares tres trees torus tores tires ruderies strews