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.
ricinus ricins raisins raciness resinous rosinous resins rosins rosiness reasons recency rezones
acinus ricinus rosinous resinous piscinas oscines niacins mucins mucinous leucines ficins leucins fascines acinous sinus scions cions ricins cines hyoscines