Intrepidity is a related term of firmness.
As nouns the difference between intrepidity and firmness
is that intrepidity
is the quality of being intrepid; bravery while firmness
is the state of being firm; strength; permanence; stability; hardness; resolution.
The quality of being intrepid; bravery.
*1877 , , page 11
- which involve the sharpest hazards to life and honour and the highest instant decisions and intrepidities of action.
* (bravery) boldness, braveness, bravery, fearlessness, fortitude, intrepidness, undauntedness, valour
The state of being firm; strength; permanence; stability; hardness; resolution.