MD vs doctorate

MD and doctorate both are nouns.

Word	Noun	Adjective	Verb	Adverb
MD	Yes	No	No	No
doctorate	Yes	No	No	No

As nouns, doctorate is a hypernym of MD; that is, doctorate is a word with a broader meaning than MD:

MD: a doctor's degree in medicine
doctorate: one of the highest earned academic degrees conferred by a university

Other hypernyms of MD include doctor's degree.

MD (noun)	doctorate (noun)
a doctor's degree in medicine	one of the highest earned academic degrees conferred by a university
a Mid-Atlantic state; one of the original 13 colonies, with capital Annapolis
a licensed medical practitioner