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.
sanious sanies sans sinuous sanes snows sains sinus scions saunas zanies sansei senecio sawneys sonnies suns sins sons sonsy snaws sense cions sones sines sunns sinhs hysons sonsie sennas seance snoozy sensei seines snooze scenes scenas sunnas sinews xenias siennas sunnahs zinnias
sanious nous aeneous venous vinous heinous genius nouns ruinous sinuous danios tenuous nos nus