is a specific kind of: fear, fearfulness, fright.

is a broader term that covers: cold feet | shyness | diffidence, self-distrust, self-doubt.

derivation: timid | faint, faint-hearted, fainthearted, timid | diffident, shy, timid, unsure.

is a specific kind of: fearfulness.

is a broader term that covers: faintheartedness, faintness.

is an attribute of: timid.

is the opposite of: boldness, daring, hardihood, hardiness.

derivation: faint, faint-hearted, fainthearted, timid.