What is the word double for great?

There isn't a single word that means "double for great." Here's why and some ways to express that concept:

* "Great" is subjective: What's great to one person might not be great to another. There's no objective standard.

* "Double" implies a specific quantity: It's not a general intensifier like "very" or "extremely."

Here are some ways to express the idea of "double for great":

* "Extraordinarily great"

* "Immensely great"

* "Exceptionally great"

* "Phenomenally great"

* "Magnificently great"

The best choice depends on the context and the specific emphasis you want to convey.