plumber vs artificer

plumber and artificer both are nouns.

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

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

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

Other hypernyms of plumber include artisan, craftsman, journeyman.

plumber (noun)	artificer (noun)
a craftsman who installs and repairs pipes and fixtures and appliances	a skilled worker who practices some trade or handicraft
	someone who is the first to think of or make something
	an enlisted man responsible for the upkeep of small arms and machine guns etc.