I have been studying Chinese for a while, and what I find interesting is that no 2 words have exactly the same definitions.
For example, 表扬 and 称赞 have almost the same meaning, but there will always be some subtle differences in meaning, which means they cannot be used interchangeably.
Are there any two chinese words Non-Nouns with exactly the same meaning, such that they can be used interchangeably?