Is the word an abstract noun or common noun?

The word "word" can be both an abstract noun and a common noun depending on the context.

Here's why:

* Abstract noun: When "word" refers to the concept of language or expression, it's an abstract noun. For example: "The power of the word is undeniable."

* Common noun: When "word" refers to a specific unit of language, it's a common noun. For example: "The word 'cat' has three letters."

So, the answer depends on the specific usage of the word "word."