Timidity, n.
Etymology: [L. timiditas: cf. F. timidité.]
The quality or state of being timid; timorousness; timidness.
Shades of meaning
Fernald has no entry of its own for timidity; he lists it under alarm, fear, modesty.
Where he writes about it:
Timidity is a quality, habit, or condition, a readiness to be affected with fear. — from alarm
A person of great timidity is constantly liable to needless alarm and even terror. — from alarm
Shyness is a tendency to shrink from observation; timidity, a distinct fear of criticism, error, or failure. — from modesty