shart vs ca-ca

shart and ca-ca both are verbs.

Word	Noun	Adjective	Verb	Adverb
shart	No	No	Yes	No
ca-ca	No	No	Yes	No

As verbs, ca-ca is a hypernym of shart; that is, ca-ca is a word with a broader meaning than shart:

Other hypernyms of shart include crap, defecate, make, shit, stool, take a crap, take a shit.

shart (verb)	ca-ca (verb)
to intend to release flatulence but actually defecate	have a bowel movement