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