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.
solanos solans solons solions silanes selenous soleness xylans salons slyness saloons silenus salinas salines slowness silliness sallowness sullenness silence
llanos solanos loans lanes linos lenos leans lawns plans cleans callans gleans lallans plains blains xylans tolans ulans lanose elains alans melanous flanes flans villains clans glans kalians elans planes rellenos silanes bullnose reloans solans tolanes uhlans yulans
solan solano silane slain solon