plumber vs craftsman

plumber and craftsman both are nouns.

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

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

plumber: a craftsman who installs and repairs pipes and fixtures and appliances
craftsman: a skilled worker who practices some trade or handicraft

Other hypernyms of plumber include artificer, artisan, journeyman.

plumber (noun)	craftsman (noun)
a craftsman who installs and repairs pipes and fixtures and appliances	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