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.
silks silkies sulks slakes slicks slacks sleeks sulkies silicas selkies siliques slugs slogs silex slags siliquose siliquous sulcus salukis sawlogs
ilks bilks milks silks rollicks whelks tilaks talks cowlicks slicks kulaks beyliks yelks baulks caulks leks licks likes balks bulks folksy elks flicks chalks walks taluks holks sulks hulks klicks polkas folks kylikes kliks killicks clicks calks yolks
silkie silk silky selkie silica siliqua siliquae silique slake sulk sulky