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.
sibyls cibols sabals sables ciboules sabulose sabulous sawbills sublease sublessee
sibyls bibles fables nobles pibals obols rabbles labels nibbles kiblas rubbles robles rubles gabbles sabals gobbles cabals baubles cobbles dibbles ghiblis doblas foibles tablas hobbles wabbles bubbles chablis bubals bobbles bals kibbles babuls babbles nubbles pueblos pebbles rebels libels nobbles quibbles rubels roubles cibols gables bels sables cables dabbles cobles diobols boylas doubles ables tables jebels wobbles babels chaebols