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.
fritts frits fruits frites frets forts farts frats fritz ferities ferrites fortis fortes forties verites ferrets veritas fretsaw verities faradise variates ferrates verts fards fords varieties fiords virtus farads vertus frauds viroids fordoes virtues faradays faradize foredoes phorates virtuosa virtuose virtuoso virtuous
britts fritts barites barrettes berettas berrettas birettas birrettas raitas brits bruits ariettas veritas heriots girts garottes curettes griots grottos quirts merits norites pirouettes pyrites rewrites sorites diorites droits traits chariots cowrites burritos riots curites writes rottes rites ariettes burettes ferrites writs frits airts frites fruits verites iritis crits caritas garrottes grits kraits lariats neuritis peritus proettes yperites cerites syrettes dirts territs worrits shirts
fritt frit fart ferity fort forte forty frat fret fretty fried fruit fruity afrit