mailer vs actor

mailer and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
mailer	Yes	No	No	No
actor	Yes	No	No	No

As nouns, actor is a hypernym of mailer; that is, actor is a word with a broader meaning than mailer:

Other hypernyms of mailer include doer, worker.

mailer (noun)	actor (noun)
a container for something to be mailed	a theatrical performer
an advertisement that is sent by mail	a person who acts and gets things done
a person who mails something