MS vs multiple sclerosis

MS and multiple sclerosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
MS	Yes	No	No	No
multiple sclerosis	Yes	No	No	No

As nouns, MS and multiple sclerosis are synonyms defined as:

MS and multiple sclerosis: a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers

Other synonyms of MS include disseminated multiple sclerosis, disseminated sclerosis.

MS (noun)	multiple sclerosis (noun)
a master's degree in science	a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers
a state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War
a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers