fecula vs excreta

fecula and excreta both are nouns.

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

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

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

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

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