wormcast vs excreta

wormcast and excreta both are nouns.

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

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

wormcast: cylindrical mass of earth voided by a burrowing earthworm or lugworm
excreta: waste matter (as urine or sweat but especially feces) discharged from the body

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

wormcast (noun)	excreta (noun)
fossil trail of a worm	waste matter (as urine or sweat but especially feces) discharged from the body
cylindrical mass of earth voided by a burrowing earthworm or lugworm