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.
irks irokos irriguous
arks carks dirks zerks porks parks merks murks larks lurks quirks quarks kirks corks chirks works shirks turks jerks barks marks warks dorks darks sarks perks mirks narks irks berks birks borks forks harks sharks charks yerks