diarrheal vs diarrhetic

diarrheal and diarrhetic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
diarrheal	No	Yes	No	No
diarrhetic	No	Yes	No	No

As adjectives, diarrheal and diarrhetic are synonyms defined as:

Other synonyms of diarrheal include diarrheic, diarrhoeal, diarrhoeic, diarrhoetic.

diarrheal (adjective)	diarrhetic (adjective)
of or relating to diarrhea	of or relating to diarrhea