confused可以当名词用吗

不可以。

adj. 困惑的混乱的糊涂的

v. 困惑（confuse的过去式）She was becoming confused.

她开始糊涂了。

My words surprised and confused him.

我的话使他既惊讶又困惑。

I'm thoroughly confused.

我完全给搞糊涂了。

I feel really confused and wretched.

我真的感到迷惑和难过。