inconstancy vs falseness

inconstancy and falseness both are nouns.

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

As nouns, inconstancy and falseness are synonyms defined as:

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

Other synonyms of inconstancy include faithlessness, fickleness.

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