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.
serfs serifs surfs serves servos seraphs zarfs ceriphs service sorghos surface surveys
serfs kerfs shereefs wharfs zarfs surfs serifs profs pervs griefs briefs curfs barfs arfs rifs reifs refs reefs turfs sharifs sherifs
serf seraph serif serve servo surf surfy