linear accelerator vs linac

linear accelerator and linac both are nouns.

Word	Noun	Adjective	Verb	Adverb
linear accelerator	Yes	No	No	No
linac	Yes	No	No	No

As nouns, linear accelerator and linac are synonyms defined as:

linear accelerator and linac: ions are accelerated along a linear path by voltage differences on electrodes along the path

linear accelerator (noun)	linac (noun)
ions are accelerated along a linear path by voltage differences on electrodes along the path	ions are accelerated along a linear path by voltage differences on electrodes along the path