Nae is a Scottish dialect word that means no or not. However, there are several synonyms for the word nae that can be used to convey the same meaning. These include the words nope, nary, not at all, never, negative, and nothing. Other related words include nix, without, devoid, lacking, and bereft. These synonyms can be used interchangeably with nae in conversations or writing, depending on the context and tone of the sentence. It's always good to have a range of synonyms for a word like nae to better express oneself and communicate more effectively.