cloaca vs zoology

cloaca and zoology both are nouns.

Word	Noun	Adjective	Verb	Adverb
cloaca	Yes	No	No	No
zoology	Yes	No	No	No

cloaca (noun)	zoology (noun)
a waste pipe that carries away sewage or surface water	the branch of biology that studies animals
(zoology) the cavity (in birds, reptiles, amphibians, most fish, and monotremes but not other mammals) at the end of the digestive tract into which the intestinal, genital, and urinary tracts open	all the animal life in a particular region or period