shits

As nouns the difference between diarrhoea and shits

is that diarrhoea is (chiefly|british spelling) (diarrhea) while shits is (shit).

As a verb shits is

(shit).

Shits is a synonym of diarrhea.

As nouns the difference between shits and diarrhea

is that shits is (shit) while diarrhea is (chiefly|north america) a condition in which the sufferer has frequent and watery bowel movements.

As a verb shits

is (shit).