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.
sophies sophs syphs soaves soughs sieves savvies scyphus saves sughs sofas sighs seifs safes civies saughs savoys civvies suffice zouaves
sophies phis aphis hives nephews ouphes raphes raphias raphis roughies tophes toughies chiefs chives shives