luthier vs craftsman

luthier and craftsman both are nouns.

Word	Noun	Adjective	Verb	Adverb
luthier	Yes	No	No	No
craftsman	Yes	No	No	No

As nouns, craftsman is a hypernym of luthier; that is, craftsman is a word with a broader meaning than luthier:

luthier: a craftsman who makes stringed instruments (as lutes or guitars or violins)
craftsman: a skilled worker who practices some trade or handicraft

Other hypernyms of luthier include artificer, artisan, journeyman.

luthier (noun)	craftsman (noun)
a craftsman who makes stringed instruments (as lutes or guitars or violins)	a skilled worker who practices some trade or handicraft
	a creator of great skill in the manual arts
	a professional whose work is consistently of high quality