magnetic tape vs mag tape

magnetic tape and mag tape both are nouns.

Word	Noun	Adjective	Verb	Adverb
magnetic tape	Yes	No	No	No
mag tape	Yes	No	No	No

As nouns, magnetic tape and mag tape are synonyms defined as:

magnetic tape and mag tape: memory device consisting of a long thin plastic strip coated with iron oxide; used to record audio or video signals or to store computer information

Other synonyms of magnetic tape include tape.

magnetic tape (noun)	mag tape (noun)
memory device consisting of a long thin plastic strip coated with iron oxide; used to record audio or video signals or to store computer information	memory device consisting of a long thin plastic strip coated with iron oxide; used to record audio or video signals or to store computer information