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.
stairs stars stirs stares sitars satires sataras satirise sautoirs stress strays strass steers steres strows satyrs sutras stours sautoires stores strews stroys straws satoris seaters suiters storeys sitters stereos stoures setters souters siddurs suitors stories sutures satirize sudaries hysterias cedars ciders citers seders sudors seeders
deairs stairs midairs wheatears stirs deodars attars stares nadirs tarsi metiers boudoirs cottars gaydars tidiers cheddars tiros tiers attires outraise puttiers redears retires sataras sautoires sitars lidars madeiras tars radars terais ottars pitiers taros tares tahrs guitars hetairas dears cedars tears retears satires sautoirs cottiers dares tires stars deodaras tatars tuataras chadars chuddars
stair satara satire sitar star stare starry stir straw strawy stray stria striae astir