MS vs induration

MS and induration both are nouns.

Word	Noun	Adjective	Verb	Adverb
MS	Yes	No	No	No
induration	Yes	No	No	No

As nouns, induration is a hypernym of MS; that is, induration is a word with a broader meaning than MS:

MS: a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers
induration: any pathological hardening or thickening of tissue

MS (noun)	induration (noun)
a master's degree in science	any pathological hardening or thickening of tissue
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