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.
frizette frisette frized frizzed furriest firriest fieriest freest forest veriest fairest farside feracity ferocity foreside forestay fireside first frost farced forced frosty frowst frusta verist verset verste
frizette rosette frisette grisette
friz fries frieze frise frisee frizz frizzy froze furies furze