diarrhoeic vs diarrhoeal

diarrhoeic and diarrhoeal both are adjectives.

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

As adjectives, diarrhoeic and diarrhoeal are synonyms defined as:

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

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