"diarrheas" in the noun sense
1. diarrhea, diarrhoea, looseness of the bowels, looseness
frequent and watery bowel movements can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License