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.
fireside foreside farside foresaid fairest viricide virusoid firriest fieriest virucide first frized forest forced freest farced frizzed furriest frisette frizette forestay frost frosty frowst frusta versed
fireside reside foreside preside shoreside resaid resid residue resite farside foresaid nearside
fires firs fairs fares feres fiars fores foresaw foresee frees fries froes vires