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.
hotbed
hotbed dabbed stobbed seedbed daubed daybed dibbed dubbed tabbed tabbied tabued tubbed tubed bedaubed jetbead outbid redubbed roadbed stabbed stubbed