antidiarrheal drug vs antidiarrheal

antidiarrheal drug and antidiarrheal both are nouns.

Word	Noun	Adjective	Verb	Adverb
antidiarrheal drug	Yes	No	No	No
antidiarrheal	Yes	No	No	No

As nouns, antidiarrheal drug and antidiarrheal are synonyms defined as:

antidiarrheal drug and antidiarrheal: a drug used to control or stop diarrhea

antidiarrheal drug (noun)	antidiarrheal (noun)
a drug used to control or stop diarrhea	a drug used to control or stop diarrhea