diarrhoea vs looseness of the bowels

diarrhoea and looseness of the bowels both are nouns.

Word	Noun	Adjective	Verb	Adverb
diarrhoea	Yes	No	No	No
looseness of the bowels	Yes	No	No	No

As nouns, diarrhoea and looseness of the bowels are synonyms defined as:

diarrhoea and looseness of the bowels: frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor

Other synonyms of diarrhoea include diarrhea, looseness.

diarrhoea (noun)	looseness of the bowels (noun)
frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor	frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor