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.
silkie selkie silk silique silky slake siliquae silica saluki sawlike siliqua sulk seallike soullike slack sleek slick sulky sleeky
folkie talkie silkie selkie alkie bowllike bowlike slake raylike doughlike belike fluke alike leke veillike flake eellike jawlike toelike wheylike quaylike owllike beelike luckie lake hoelike kulaki lawlike pealike bloke seallike saluki sawlike soullike taillike like tealike toylike woollike
sail scilla sill silly silo soil