Unrest, n.
Want of rest or repose; unquietness; sleeplessness; uneasiness; disquietude. Is this, quoth she, the cause of your unrest! Chaucer. Can calm despair and wild unrest Be tenants of a single breast Tennyson.
Shades of meaning
Fernald lists unrest only as an antonym, under rest.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given