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.
xylenes xylans soleness sullenness salines slyness silenus silence silanes salience selenous slowness selenious silliness sallowness salons solans solons salinas saloons solanos solions
xylenes lenes lens villeins aliens colleens fulness foulness illness lense clines tallness chalones valines wellness silence flanes violones bowlines beelines baleens alines felines cholines woolens toluenes dullness melenas soleness coolness galleins gleans guylines oleines alienees lunes mulleins paleness pleons pollens relines salines maleness liens juliennes rellenos lenos lenis valence flense violence fellness leones fullness oleins vileness jawlines haleness blueness cleans malines bylines leans planes mullens poleyns lanes silenus clones realness galleons glens millines colones silanes kaolines dulness tolanes towlines galenas wholeness woollens lines chillness hyalines