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.
siliqua siliquae silique silica silkie silk slag slug salic silky slack slake slick celiac slaggy sawlike
siliqua clique cliquy lalique relique siliquae silique