What is another word for mentally healthy or sound?

Here are some words that can be used to describe someone who is mentally healthy or sound:

Formal:

* Well-adjusted

* Balanced

* Stable

* Sane

* Cognitively intact

* Emotionally mature

* Psychologically healthy

* Mentally sound

* In good mental health

Informal:

* Normal

* Okay

* Healthy

* Level-headed

* Grounded

* Together

* In control

* Mentally fit

The best word to use will depend on the specific context and the level of formality required.