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.
licence licencee license lucence licensee lucency looseness lysins lessens lessons leucins loosens lysines
licence nascence quiescence lucence essence recency cense scenes science seance bioscience geoscience license lucency nascency nescience licencee decency