brushwork vs technique

brushwork and technique both are nouns.

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

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

brushwork: an artist's distinctive technique of applying paint with a brush
technique: skillfulness in the command of fundamentals deriving from practice and familiarity

Other hypernyms of brushwork include proficiency.

brushwork (noun)	technique (noun)
an artist's distinctive technique of applying paint with a brush	a practical method or art applied to some particular task
	skillfulness in the command of fundamentals deriving from practice and familiarity