familiar vs everyday

familiar is a noun but everyday is not a noun.

Word	Noun	Adjective	Verb	Adverb
familiar	Yes	Yes	No	No
everyday	No	Yes	No	No

familiar (noun)	everyday (noun)
a spirit (usually in animal form) that acts as an assistant to a witch or wizard
a person attached to the household of a high official (as a pope or bishop) who renders service in return for support
a friend who is frequently in the company of another

familiar (adjective)	everyday (adjective)
well known or easily recognized	commonplace and ordinary
within normal everyday experience; common and ordinary; not strange	appropriate for ordinary or routine occasions
having mutual interests or affections; of established friendship	found in the ordinary course of events
(usually followed by `with') well informed about or knowing thoroughly