machinist vs craftsman

machinist and craftsman both are nouns.

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

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

Other hypernyms of machinist include artificer, artisan, journeyman.

machinist (noun)	craftsman (noun)
a craftsman skilled in operating machine tools	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