Is this the opposite of oxymoron? How about pairs of pleonasms and oxymorons that are somewhat related to each other?

How about...an extra surplus of smart/casual clothes

Is this the opposite of oxymoron?

I do not think so. A oxymoron can be pleonastic, too. The interesting thing I find about both terms is that some take them as negative phenomena. In rhetoric, there is nothing inherently wrong with oxymora or pleonasmata. They are just rhetorical devices like synecdoche or zeugma.

WELCOME R2M

oxymoron is one of my favourite words purely because it does, quite literally do what is says on the tin...
OXY - sharp, keen, acid
and
MORON - foolish or stupid (person)
so therefore oxymoron is indeed an oxymoron

so therefore oxymoron is indeed an oxymoron

I think it was accidentally on purpose.

I cant believe I didn't know that.....that the word was, in itself an oxymoron. I have loved oxymoron words for ages and collect them.

I have loved oxymoron words for ages and collect them. Well, you have found some friends here, that's for sure!

Good one!

Oxymoron = an Oxymoron. I also did not know that. Thanks!