faithlessness vs falseness

faithlessness and falseness both are nouns.

Word	Noun	Adjective	Verb	Adverb
faithlessness	Yes	No	No	No
falseness	Yes	No	No	No

As nouns, faithlessness and falseness are synonyms defined as:

faithlessness and falseness: unfaithfulness by virtue of being unreliable or treacherous

Other synonyms of faithlessness include fickleness, inconstancy.

faithlessness (noun)	falseness (noun)
unfaithfulness by virtue of being unreliable or treacherous	the quality of not being open or truthful; deceitful or hypocritical
	unfaithfulness by virtue of being unreliable or treacherous
	the state of being false or untrue