pluckiness vs fearlessness

pluckiness and fearlessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
pluckiness	Yes	No	No	No
fearlessness	Yes	No	No	No

As nouns, fearlessness is a hypernym of pluckiness; that is, fearlessness is a word with a broader meaning than pluckiness:

pluckiness: the trait of showing courage and determination in spite of possible loss or injury
fearlessness: the trait of feeling no fear

pluckiness (noun)	fearlessness (noun)
the trait of showing courage and determination in spite of possible loss or injury	the trait of feeling no fear
	feeling no fear