facsimile machine vs fax

facsimile machine and fax both are nouns.

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

As nouns, facsimile machine and fax are synonyms defined as:

facsimile machine and fax: duplicator that transmits the copy by wire or radio

Other synonyms of facsimile machine include facsimile.

facsimile machine (noun)	fax (noun)
duplicator that transmits the copy by wire or radio	duplicator that transmits the copy by wire or radio

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