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.
scissile sessile sassily sisal sizzle saucily cicely zizzle
fissile missile sessile scissile mussily tussle messily loessial sassily rissole reassail rassle pussley fusile gassily fussily fossil bossily assoil hassle wrassle resile dossil assail wassail
cissy sissy cuisses cissies sises sisses sissies cis sis