The difference between Aviatrix and Flyer

When used as nouns, aviatrix means a female aviator, whereas flyer means a machine that flies.

Flyer is also verb with the meaning: to distribute flyers (leaflets).

check bellow for the other definitions of Aviatrix and Flyer

Flyer as a noun:

A machine that flies.
Flyer as a noun:

Someone who pilots or rides in an airplane.
Flyer as a noun:

A leaflet, often for advertising.
Flyer as a noun:

The part of a spinning machine that twists the thread as it takes it to and winds it on the bobbin
Flyer as a noun (architecture):

An arch that connects a flying buttress into the structure it supports.
Flyer as a noun (acrobatics, cheerleading):

The person who is lifted and/or thrown by another person or persons.
Flyer as a noun (firearms):

A stray shot away from the group on a target.
Flyer as a noun:

A standard rectangular step of a staircase (as opposed to a winder).
Flyer as a noun:

A female kangaroo; a roo; a doe; a jill.
Flyer as a noun:

A leap or jump.
Flyer as a noun:

A risky investment or other venture.

Flyer as a verb (intransitive):

To distribute flyers (leaflets).
Flyer as a verb (transitive):

To distribute flyers in (a location) or to (recipients).