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.
sunnahs sunnas sunns sennas saunas suns siennas snaws sinhs scenas zinnias sonnies sons sins sans sines sonsy snows sense sains sones sensa sanes sinus scenes sanies sansei seines sinews sonsie snazzy sensei scions hysons sanious sawneys sinuous
sunnahs annas hennas cannas goannas mannas mynahs nonas pinnas rennase sennas siennas sunnas zinnias donnas duennas
sunna sunnah sunn sauna senna sunny sun