Here is a contribution from my friend CS.Pooja.
An oxymoron is usually defined as a phrase in which two words of contradictory meaning are brought together:-
Read till end
1) Clearly misunderstood
2) Exact Estimate
3) Small Crowd
4) Act Naturally
5) Found Missing
6) Fully Empty
7) Pretty ugly
8) Seriously funny
9) Only choice
10) Original copies
And the Mother of all......
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11) Happily Married