diarrheal vs diarrhoeal

diarrheal and diarrhoeal both are adjectives.

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

As adjectives, diarrheal and diarrhoeal are synonyms defined as:

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

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