succedaneum vs medical specialty

succedaneum and medical specialty both are nouns.

Word	Noun	Adjective	Verb	Adverb
succedaneum	Yes	No	No	No
medical specialty	Yes	No	No	No

succedaneum (noun)	medical specialty (noun)
(medicine) something that can be used as a substitute (especially any medicine that may be taken in place of another)	the branches of medical science that deal with nonsurgical techniques