What is another word for densest?

Here are some words that can be used as synonyms for "densest" depending on the context:

For density in general:

* Thickest

* Most compact

* Heaviest

* Most concentrated

* Most tightly packed

* Most solid

For density related to a specific substance:

* Most dense (this is the most direct synonym)

* Highest density

* Greatest density

For density related to fog or smoke:

* Thickest

* Most opaque

* Heaviest

For density related to abstract concepts like thought or language:

* Most profound

* Most complex

* Most intricate

* Most concentrated

For density related to population:

* Most populated

* Heaviest

* Most congested

The best choice will depend on the specific situation.