What is another word for predominantly?

Here are some words that can be used as alternatives to "predominantly," depending on the specific context and nuance you want to convey:

More formal:

* Primarily

* Chiefly

* Mainly

* Mostly

* For the most part

* In the main

* By and large

More informal:

* Mostly

* Mainly

* For the most part

* Generally

* Typically

* Usually

* Often

More specific:

* Heavily (if something is dominant in a very large amount)

* Overwhelmingly (if something is dominant in a very large and clear way)

* Significantly (if something is dominant in a notable way)

The best alternative will depend on the specific context of your writing.