diarrhea 0 antonyms and opposites of diarrhea. Noun — A digestive condition causing frequent, loose, watery bowel movements. Synonyms for diarrhea poop water the runs the squirts the squits the trots the skitters loose motion bubble guts dysentery Hershey squirts lask runs skitters squirts squits trots LBM ← Back to the full definition of diarrhea