faithlessness vs fickleness

faithlessness and fickleness both are nouns.

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

As nouns, faithlessness and fickleness are synonyms defined as:

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

Other synonyms of faithlessness include falseness, inconstancy.

faithlessness (noun)	fickleness (noun)
unfaithfulness by virtue of being unreliable or treacherous	unfaithfulness by virtue of being unreliable or treacherous