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.
scissions cessions sessions sissiness seisins sasins sassiness sissyness seasons seizins sauciness sozins siziness
missions cessions fissions sessions scissions passions quassins gossoons cassines osseins lessons scions sasins cassinos caissons hessians essoins bassoons cassinas sins sons