wormcast vs excretion

wormcast and excretion both are nouns.

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

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

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

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

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