flier vs circular

flier and circular both are nouns.

Word	Noun	Adjective	Verb	Adverb
flier	Yes	No	No	No
circular	Yes	Yes	No	No

As nouns, flier and circular are synonyms defined as:

flier and circular: an advertisement (usually printed on a page or in a leaflet) intended for wide distribution

Other synonyms of flier include bill, broadsheet, broadside, flyer, handbill, throwaway.

flier (noun)	circular (noun)
an advertisement (usually printed on a page or in a leaflet) intended for wide distribution	an advertisement (usually printed on a page or in a leaflet) intended for wide distribution
someone who travels by air
someone who operates an aircraft

flier (adjective)	circular (adjective)
	having the shape or form of a circle
	describing a circle; moving in a circle