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.
salsa sals sails sales sauls seals sels sallows sols sallies sailless slows solus slays sulus soles solos souls slues silos slaws sells sills seels zeals soils slews sylis sloes soleus selahs selles scillas sillies sullies zealous soilless soulless cels
balsa salsa als also calesa koalas aals hauls galas halls fails ales males phials alls coalas pawls galls hails miauls false veals mauls vales pals pales reales bialis alas rails sials talls sheals shauls talas wheals weals dials wauls wales teals awls ails gaols nalas rials taels lalls dals calos seals dahls sales kails baals bialys pails sauls bales malls duals halos dales wails balls tales shales balas wawls heals goals vails jouals bals coals bails peals vials rales palsy bawls shoals jails reals nails meals mails cauls quails palls gals falls valse foals calls kales shawls sails sals gales hales zeals deals tails talus walls whales yawls
sal sail sale sall sallow sallowy sally saul seal sassily