facsimile vs fax

facsimile and fax both are nouns.

Word	Noun	Adjective	Verb	Adverb
facsimile	Yes	No	Yes	No
fax	Yes	No	Yes	No

As nouns, facsimile and fax are synonyms defined as:

Other synonyms of facsimile include facsimile machine.

As verbs, facsimile and fax are synonyms defined as:

Other synonyms of facsimile include telefax.

facsimile (noun)	fax (noun)
duplicator that transmits the copy by wire or radio	duplicator that transmits the copy by wire or radio
an exact copy or reproduction

facsimile (verb)	fax (verb)
send something via a facsimile machine	send something via a facsimile machine