Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun excretion

2 senses of excretion

Sense 1
elimination, evacuation, excretion, excreting, voiding -- (the bodily process of discharging waste matter)
       => discharge, emission, expelling -- (any of several bodily processes by which substances go out of the body; "the discharge of pus")

Sense 2
body waste, excretion, excreta, excrement, excretory product -- (waste matter (as urine or sweat but especially feces) discharged from the body)
       => waste, waste material, waste matter, waste product -- (any materials unused and rejected as worthless or unwanted; "they collect the waste once a week"; "much of the waste material is carried off in the sewers")