aesthetician vs skilled worker

aesthetician and skilled worker both are nouns.

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

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

aesthetician: a worker skilled in giving beauty treatments (manicures and facials etc.)
skilled worker: a worker who has acquired special skills

Other hypernyms of aesthetician include skilled workman, trained worker.

aesthetician (noun)	skilled worker (noun)
a philosopher who specializes in the nature of beauty	a worker who has acquired special skills
a worker skilled in giving beauty treatments (manicures and facials etc.)