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.
slily sillily slyly slowly solely sallowly salal salol
lily lowlily daylily wilily jollily chillily sillily oilily slily holily woollily leally solely filially telial allyl filial palely lilo ilial vilely glial gluily lolly pallial flail
sail sall sallow sallowy sally scilla sell selle sill silly silo soil soli sully syli