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.
lassi lassie lass lasso las leas lays loss laws less lase lease lossy lyssa hylas luaus loess liaise lessee les lis lues lace lacy lazy lees lies loci lose laze leis lows leys loos lyse lice
bassi lassi ass tass sassy wrasse passe ossia mass quassia masse quass quasi gussie gauss lassie tassie gassy issei byssi asci tasse dassie cassia sass lass poussie pass bassy assai massy bass massa basso lasso chasse