(n.) The condition or quality of being sane; soundness of health of body or mind, especially of the mind; saneness.

IQ apprehension balance caliber capacity common sense comprehension conception cool head coolheadedness coolness deductive power due sense of esemplastic power good sense horse sense ideation integrative power intellect intellectual grasp intellectual power intellectualism intellectuality intelligence intelligence quotient knowledge level head levelheadedness lucidity marbles mental age mental capacity mental grasp mental health mental ratio mentality mind mother wit native wit normality plain sense power of mind practical mind practical wisdom practicality rationality reason reasonableness reasoning power saneness scope of mind sense senses sensibleness sober-mindedness soberness sobriety sound mind soundness stability thinking power understanding wit