haematochezia vs shitting

haematochezia and shitting both are nouns.

Word	Noun	Adjective	Verb	Adverb
haematochezia	Yes	No	No	No
shitting	Yes	No	No	No

As nouns, shitting is a hypernym of haematochezia; that is, shitting is a word with a broader meaning than haematochezia:

haematochezia: passage of stools containing blood (as from diverticulosis or colon cancer or peptic ulcer)
shitting: the elimination of fecal waste through the anus

Other hypernyms of haematochezia include defecation, laxation.

haematochezia (noun)	shitting (noun)
passage of stools containing blood (as from diverticulosis or colon cancer or peptic ulcer)	the elimination of fecal waste through the anus