brooder vs apparatus

brooder and apparatus both are nouns.

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

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

brooder: apparatus consisting of a box designed to maintain a constant temperature by the use of a thermostat; used for chicks or premature infants
apparatus: equipment designed to serve a specific function

Other hypernyms of brooder include setup.

brooder (noun)	apparatus (noun)
apparatus consisting of a box designed to maintain a constant temperature by the use of a thermostat; used for chicks or premature infants	equipment designed to serve a specific function
	(anatomy) a group of body parts that work together to perform a given function