Sanity, n.
Etymology: [L. saniras, from sanus sound, healthy. See Sane.]
The condition or quality of being sane; soundness of health of body or mind, especially of the mind; saneness.
Shades of meaning
Fernald lists sanity only as an antonym, under insanity.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given