esthetician vs skilled workman

esthetician and skilled workman both are nouns.

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

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

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

Other hypernyms of esthetician include skilled worker, trained worker.

esthetician (noun)	skilled workman (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.)