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.
silicle siliculae silicula silkily slickly sulcal slackly sleekly sulkily
follicle calicle caulicle pellicle silicle helical calycle plical pollical
silica salic siliqua siliquae silique silkie slick