esthetician vs skilled worker

esthetician and skilled worker both are nouns.

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

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

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

Other hypernyms of esthetician include skilled workman, trained worker.

esthetician (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.)