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.
sleazo sleaze sleazy salsa soles sales solos slues sloes slews slays silos slaws slows seals slice selahs soleus selles solace sluice sallies sallows scillas sillies sullies zealous sailless soilless soulless
sale seal selah slaw slay slew sloe slue sola sole solei isle