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.
serosity serest searest cerusite cerussite sorest surest sourest sorriest
curiosity cariosity morosity porosity serosity torosity ferocity frosty frowsty varsity jarosite prosit
serosa serosae sers ceros saros sears seers seres serious serous serows suers zeros users