flier vs trained worker

flier and trained worker both are nouns.

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

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

Other hypernyms of flier include skilled worker, skilled workman.

flier (noun)	trained worker (noun)
an advertisement (usually printed on a page or in a leaflet) intended for wide distribution	a worker who has acquired special skills
someone who travels by air
someone who operates an aircraft