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.
fascist fussiest foziest fizziest fuzziest
fascist cist casuist coassist cosiest gassiest goosiest laciest juiciest mossiest massiest noisiest paciest raciest resist sassiest sissiest diciest cheesiest mussiest hissiest iciest messiest easiest busiest bossiest bassist assist queasiest fussiest lousiest mousiest newsiest nosiest pussiest racist rosiest sauciest desist wussiest choosiest