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.
heroic hayrick hayrack
heroic roc auric areic wrick rock rick croc baric myrica lorica ceric daric duroc taroc triac trock ureic choreic prick boric brick pyric erica ferric frock hayrick crick crock brock naric lyric xeric derrick hydric toric trick yttric uric choric
hero her hear heir here herry hoer