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.
sannup sannop sunup snap snip sneap snipe snoop snappy snippy snoopy sinopie
sannup lineup pinup sannop sunup tuneup
sain sane sauna sawn sawney senna sonny sunn sunna sunnah sunny asana