excretion vs behind

excretion and behind both are nouns.

Word	Noun	Adjective	Verb	Adverb
excretion	Yes	No	No	No
behind	Yes	Yes	No	Yes

excretion (noun)	behind (noun)
the bodily process of discharging waste matter	the fleshy part of the human body that you sit on
waste matter (as urine or sweat but especially feces) discharged from the body

excretion (adjective)	behind (adjective)
	having the lower score or lagging position in a contest

excretion (adverb)	behind (adverb)
	in or to or toward the rear
	remaining in a place or condition that has been left or departed from
	in debt
	in or into an inferior position
	showing a time that is earlier than the actual time