Compound Nouns

Can anyone prove that the word "car accident" is a compound noun? Thanks, Astrid

My try:

Astridhasday wrote:

Can anyone prove that the word "car accident" is a compound noun?

No, no one can. Because it isn't.

Astridhasday wrote:

Why not?

When is a noun made up of two or more words called a compound noun?

To me, it's when the collocation is RATHER fixed.

And to me car accident is not THAT fixed, so I'd rather not call it a compound noun.

But at this point, only a native speaker's judgement is reliable.  We have to wait to see what the teachers would say.

Maple

I stand corrected, and I've learned sth I didn't know before.

Thank you CJ, Barbara and Doll. 

And thank you Astridhasday for posting this question which came out to let us both learn.

Maple