Firmness
Part of speech: noun
Definition: The state of being firm; strength; permanence; stability; hardness; resolution.
Example sentence: Parents should have perfect control over their own spirits, and with mildness and yet firmness bend the will of the child until it shall expect nothing else but to yield to their wishes.
Resolve
Part of speech: noun
Definition: Determination, will power.
Part of speech: verb
Definition: To find a solution to (a problem).To solve again.To make a firm decision to do something.
Example sentence: This is the moment when we must come together to save this planet. Let us resolve that we will not leave our children a world where the oceans rise and famine spreads and terrible storms devastate our lands.