What is another word for congitive?

There isn't one single perfect synonym for "cognitive," as it has a broad meaning related to mental processes. However, depending on the context, you could use some of these words:

General synonyms:

* Mental

* Intellectual

* Perceptual

* Thinking

* Reasoning

* Understanding

More specific synonyms:

* For "cognitive abilities": intellectual capacity, mental skills, reasoning power

* For "cognitive processes": thought processes, information processing, mental operations

* For "cognitive development": intellectual growth, mental maturation

The best substitute will depend on the specific sentence you're trying to write.