aesthetician vs trained worker

aesthetician and trained worker both are nouns.

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

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

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

Other hypernyms of aesthetician include skilled worker, skilled workman.

aesthetician (noun)	trained 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.)