pliantness vs adaptability

pliantness and adaptability both are nouns.

Word	Noun	Adjective	Verb	Adverb
pliantness	Yes	No	No	No
adaptability	Yes	No	No	No

As nouns, adaptability is a hypernym of pliantness; that is, adaptability is a word with a broader meaning than pliantness:

pliantness: adaptability of mind or character
adaptability: the ability to change (or be changed) to fit changed circumstances

pliantness (noun)	adaptability (noun)
adaptability of mind or character	the ability to change (or be changed) to fit changed circumstances
the property of being pliant and flexible