You might look up the subject on Wikipedia, Ethan's Oxymorons Page or another page I like.
It's interesting to note that oxymoron is a Greek term derived from oxy ("sharp") and moros ("dull"). Thus the word oxymoron is itself an oxymoron.
The classic oxymoron is military intelligence. Here are other oxymorons:
* Deafening silence
* Sweet sorrow
* Forward retreat
* Silent scream
* Quiet riot
* Serious joke
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Entries from The Dog Blog
Blog entries from The Auto Racing Journal
(a book of great stories about the Intimidator)
(the book of great NASCAR stories)
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Anecdotes by Tom Gillispie