tuner vs trained worker

tuner and trained worker both are nouns.

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

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

Other hypernyms of tuner include skilled worker, skilled workman.

tuner (noun)	trained worker (noun)
an electronic receiver that detects and demodulates and amplifies transmitted signals	a worker who has acquired special skills
someone who tunes a musical instrument