It is the plural of oxymoron. Yes, it is. So is oxymorons.
Would I lie to you?
According to dictionary.com, an oxymoron is a figure of speech by which a locution produces an incongruous, seemingly self-contradictory effect, as in “cruel kindness” or “to make haste slowly.”
Here are some more
Can you think of more?
Microsoft Works is not an oxymoron. It may be mildly amusing, even aggravating, that Microsoft does not always work as you think it should, but Microsoft Works is not an oxymoron. Neither is Great Depression. Mountainous Depression, now that would be an oxymoron.
If you were confused by the title of this post, if you expected something else, if perhaps a tune you can’t quite place is running through your head, click here (2:31).
There, now, don’t you feel better?