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.
sliest silliest soloist scilicet sciolist sliced celesta celeste cellist sluiced solicit salacity silicide solaced sleazoid
eeliest shelliest palliest vealiest jowliest silliest hilliest oiliest jolliest wooliest paliest woolliest chilliest shoaliest bulliest coaliest fliest holiest gluiest ruliest wiliest roiliest sliest lowliest mealiest shaliest ballista blest poloist dualist fellest illest pollist realest duellist dialist celesta relist dullest holist heliast chillest bluest niellist list shoalest coolest scilicet lest chiliast teleost molest realist vilest palest cellist sciolist fullest duelist alist foulest celeste delist soloist diallist halest tallest whilst least phallist violist
sales sleaze sleazo sleazy slews slice sloes slues sluice sluicy soles soleus sylis isles