steamfitter vs artificer

steamfitter and artificer both are nouns.

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

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

steamfitter: a craftsman who installs and maintains equipment for ventilating or heating or refrigerating
artificer: a skilled worker who practices some trade or handicraft

Other hypernyms of steamfitter include artisan, craftsman, journeyman.

steamfitter (noun)	artificer (noun)
a craftsman who installs and maintains equipment for ventilating or heating or refrigerating	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.