supple vs suppleness

supple is not a noun while suppleness is a noun.

Word	Noun	Adjective	Verb	Adverb
supple	No	Yes	Yes	No
suppleness	Yes	No	No	No

supple (noun)	suppleness (noun)
	the gracefulness of a person or animal that is flexible and supple
	the property of being pliant and flexible
	adaptability of mind or character

supple (adjective)	suppleness (adjective)
(used of e.g. personality traits) readily adaptable
gracefully thin and bending and moving with ease
(used of persons' bodies) capable of moving or bending freely

supple (verb)	suppleness (verb)
make pliant and flexible