fecula vs excretion

fecula and excretion both are nouns.

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

As nouns, excretion is a hypernym of fecula; that is, excretion is a word with a broader meaning than fecula:

fecula: excreta (especially of insects)
excretion: waste matter (as urine or sweat but especially feces) discharged from the body

Other hypernyms of fecula include body waste, excrement, excreta, excretory product.

fecula (noun)	excretion (noun)
excreta (especially of insects)	the bodily process of discharging waste matter
	waste matter (as urine or sweat but especially feces) discharged from the body