steadiness vs firmness

steadiness and firmness both are nouns.

Word	Noun	Adjective	Verb	Adverb
steadiness	Yes	No	No	No
firmness	Yes	No	No	No

As nouns, steadiness and firmness are synonyms defined as:

steadiness and firmness: the quality of being steady or securely and immovably fixed in place

As nouns, firmness is a hypernym of steadiness; that is, firmness is a word with a broader meaning than steadiness:

steadiness: freedom from wavering or indecision; constancy of resolve or conduct
firmness: the trait of being resolute

Other hypernyms of steadiness include firmness of purpose, resoluteness, resolution, resolve.

steadiness (noun)	firmness (noun)
the quality of being steady or securely and immovably fixed in place	the quality of being steady or securely and immovably fixed in place
the quality of being steady--regular and unvarying	the trait of being resolute
freedom from wavering or indecision; constancy of resolve or conduct	the property of being unyielding to the touch
	the muscle tone of healthy tissue