technique vs skillfulness

technique and skillfulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
technique	Yes	No	No	No
skillfulness	Yes	No	No	No

As nouns, skillfulness is a hypernym of technique; that is, skillfulness is a word with a broader meaning than technique:

technique: skillfulness in the command of fundamentals deriving from practice and familiarity
skillfulness: the state of being cognitively skillful

technique (noun)	skillfulness (noun)
a practical method or art applied to some particular task	the state of being cognitively skillful
skillfulness in the command of fundamentals deriving from practice and familiarity