stern vs excreta

stern and excreta both are nouns.

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

stern (noun)	excreta (noun)
the rear part of a ship	waste matter (as urine or sweat but especially feces) discharged from the body
the fleshy part of the human body that you sit on

stern (adjective)	excreta (adjective)
severe and unremitting in making demands
not to be placated or appeased or moved by entreaty
of a stern or strict bearing or demeanor; forbidding in aspect
severely simple