How do you spell a big word for million?

There isn't really a "big word" for million in the traditional sense. "Million" itself is a large number.

However, you might be looking for words that express even larger quantities:

* Billion: 1,000,000,000 (one thousand million)

* Trillion: 1,000,000,000,000 (one million million)

* Quadrillion: 1,000,000,000,000,000 (one thousand trillion)

* Quintillion: 1,000,000,000,000,000,000 (one million trillion)

And so on! The pattern continues with "sextillion," "septillion," "octillion," and so forth.