technique vs musketry

technique and musketry both are nouns.

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

As nouns, musketry is a hyponym of technique; that is, musketry is a word with a more specific, narrower meaning than technique:

technique: skillfulness in the command of fundamentals deriving from practice and familiarity
musketry: the technique of using small arms (especially in battle)

Other hyponyms of technique include brushwork.

technique (noun)	musketry (noun)
a practical method or art applied to some particular task	the technique of using small arms (especially in battle)
skillfulness in the command of fundamentals deriving from practice and familiarity	musketeers and their muskets collectively