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.
assist assessed
assist resist coassist desist bassist mousiest booziest necessity loosest gassiest pussiest lousiest ooziest rosiest noisiest queaziest cist haziest maziest laciest fuzziest goosiest foziest fussiest cosiest iciest fizziest casuist jazziest siziest diciest doziest whizziest wooziest cheesiest housesit mossiest sassiest massiest hissiest zoisite basest zooiest easiest laziest hylozoist queasiest gauziest coziest juiciest busiest sauciest muzziest messiest racist sissiest mussiest mysost newsiest nosiest paciest raciest bossiest fascist dizziest wheeziest wisest wussiest choosiest
assize assais assays asses assess