optician vs skilled worker

optician and skilled worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
optician	Yes	No	No	No
skilled worker	Yes	No	No	No

As nouns, skilled worker is a hypernym of optician; that is, skilled worker is a word with a broader meaning than optician:

Other hypernyms of optician include skilled workman, trained worker.

optician (noun)	skilled worker (noun)
a worker who makes glasses for remedying defects of vision	a worker who has acquired special skills