defecator vs apparatus

defecator and apparatus both are nouns.

Word	Noun	Adjective	Verb	Adverb
defecator	Yes	No	No	No
apparatus	Yes	No	No	No

As nouns, apparatus is a hypernym of defecator; that is, apparatus is a word with a broader meaning than defecator:

defecator: (obsolete) that which cleanses or purifies; especially, an apparatus for removing the feculencies of juices and syrups.
apparatus: equipment designed to serve a specific function

Other hypernyms of defecator include setup.

defecator (noun)	apparatus (noun)
(obsolete) that which cleanses or purifies; especially, an apparatus for removing the feculencies of juices and syrups.	equipment designed to serve a specific function
a person who defecates	(anatomy) a group of body parts that work together to perform a given function