flyer vs traveler

flyer and traveler both are nouns.

Word	Noun	Adjective	Verb	Adverb
flyer	Yes	No	No	No
traveler	Yes	No	No	No

As nouns, traveler is a hypernym of flyer; that is, traveler is a word with a broader meaning than flyer:

Other hypernyms of flyer include traveller.

flyer (noun)	traveler (noun)
an advertisement (usually printed on a page or in a leaflet) intended for wide distribution	a person who changes location
someone who travels by air
someone who operates an aircraft