Noun nervousness has 3 senses
  1. jitteriness, jumpiness, nervousness, restiveness - the anxious feeling you have when you have the jitters
    --1 is a kind of anxiety
  2. nervousness, nerves - an uneasy psychological state; "he suffered an attack of nerves"
    --2 is a kind of psychological state, mental state
    --2 has particulars:
     jitters, heebie-jeebies, screaming meemies; strain, mental strain, nervous strain
  3. nervousness - a sensitive or highly strung temperament
    --3 is a kind of
    disposition, temperament
    --3 has particulars: restlessness, uneasiness; skittishness, restiveness