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.
looseness loosens lousiness lessens lysines laciness laziness leucines lysins lessons licence lucence licencee licensee
looseness baseness wiseness cheesiness rosiness cassenes sissyness sassiness cosiness noisiness newsiness mousiness messiness lousiness queasiness gassiness piousness fussiness nosiness busyness sissiness business bossiness biasness bassness seines scenes massiness mossiness mussiness niceness easiness choiceness