shit vs shitty

shit is a noun but shitty is not a noun.

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

shit (noun)	shitty (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 (adjective)	shitty (adjective)
	very bad

shit (verb)	shitty (verb)
have a bowel movement
give away information about somebody