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.
casuist coassist cosiest gassiest gauziest queasiest coziest goosiest queaziest
casuist assist cheesiest desist sassiest resist nosiest newsiest mousiest messiest bassist bossiest busiest easiest fascist fussiest hissiest coassist cosiest gassiest goosiest queasiest lousiest massiest mossiest mussiest noisiest pussiest rosiest sissiest wussiest choosiest