steadfastness vs staunchness

steadfastness and staunchness both are nouns.

Word	Noun	Adjective	Verb	Adverb
steadfastness	Yes	No	No	No
staunchness	Yes	No	No	No

As nouns, steadfastness and staunchness are synonyms defined as:

steadfastness and staunchness: loyalty in the face of trouble and difficulty

steadfastness (noun)	staunchness (noun)
loyalty in the face of trouble and difficulty	loyalty in the face of trouble and difficulty
steadfast resolution