hard hat vs artisan

hard hat and artisan both are nouns.

Word	Noun	Adjective	Verb	Adverb
hard hat	Yes	No	No	No
artisan	Yes	No	No	No

As nouns, artisan is a hypernym of hard hat; that is, artisan is a word with a broader meaning than hard hat:

Other hypernyms of hard hat include artificer, craftsman, journeyman.

hard hat (noun)	artisan (noun)
a lightweight protective helmet (plastic or metal) worn by construction workers	a skilled worker who practices some trade or handicraft
a worker skilled in building offices or dwellings etc.