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.
fretsaw frets ferrets farts frits forts frats frites fruits fortis fritts fortes fordoes forties virtuosa ferrites ferrates ferities foredoes fards fords fritz varieties verts farads fiords frauds vertus virtus veritas verites virtues