aviatrix vs flier

aviatrix and flier both are nouns.

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

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

Other hypernyms of aviatrix include aeronaut, aviator, flyer, adult female, woman.

aviatrix (noun)	flier (noun)
a woman aviator	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