technician vs trained worker

technician and trained worker both are nouns.

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

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

technician: someone whose occupation involves training in a specific technical process
trained worker: a worker who has acquired special skills

Other hypernyms of technician include skilled worker, skilled workman.

technician (noun)	trained worker (noun)
someone whose occupation involves training in a specific technical process	a worker who has acquired special skills
someone known for high skill in some intellectual or artistic technique