shit vs excrete

shit is a noun but excrete is not a noun.

Word	Noun	Adjective	Verb	Adverb
shit	Yes	No	Yes	No
excrete	No	No	Yes	No

As verbs, excrete is a hypernym of shit; that is, excrete is a word with a broader meaning than shit:

Other hypernyms of shit include egest, eliminate, pass.

shit (noun)	excrete (noun)
something of little value
Obscene word for unacceptable behavior
insulting terms of address for people who are stupid or irritating or ridiculous
a coarse term for defecation
a small worthless amount
obscene terms for feces

shit (verb)	excrete (verb)
have a bowel movement	eliminate from the body
give away information about somebody