emission vs bodily function

emission and bodily function both are nouns.

Word	Noun	Adjective	Verb	Adverb
emission	Yes	No	No	No
bodily function	Yes	No	No	No

As nouns, bodily function is a hypernym of emission; that is, bodily function is a word with a broader meaning than emission:

emission: any of several bodily processes by which substances go out of the body
bodily function: an organic process that takes place in the body

Other hypernyms of emission include activity, bodily process, body process.

emission (noun)	bodily function (noun)
the act of emitting; causing to flow forth	an organic process that takes place in the body
the occurrence of a flow of water (as from a pipe)
the release of electrons from parent atoms
any of several bodily processes by which substances go out of the body
a substance that is emitted or released