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.
license licensee licence licencee lucence lysins loosens leucins lessons lucency lysines lessens laciness laziness leucines liaisons looseness lousiness
license cense scenas scenes sense sensei biocenose quiescence licence licensee lucence missense nascence oceans