or和nor是不是近义词?是不是反义词？

or
conj.
或, 或者, 还是
John or you are in Class Two.
约翰或者你在二班。

nor
conj.
也不
He does not do it, nor does he try.
他没有做, 也没尝试一下。

是反义词来的

近义词,用法不一样
He isn't a teacher or a writer.
He is neither a teacher nor a writer.