babysitter vs sitter

babysitter and sitter both are nouns.

Word	Noun	Adjective	Verb	Adverb
babysitter	Yes	No	No	No
sitter	Yes	No	No	No

As nouns, babysitter and sitter are synonyms defined as:

babysitter and sitter: a person engaged to care for children when the parents are not home

Other synonyms of babysitter include baby-sitter.

babysitter (noun)	sitter (noun)
a person engaged to care for children when the parents are not home	a domestic hen ready to brood
	a person engaged to care for children when the parents are not home
	an organism (person or animal) that sits
	a person who poses for a painter or sculptor