sitter vs babysitter

sitter and babysitter both are nouns.

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

As nouns, sitter and babysitter are synonyms defined as:

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

Other synonyms of sitter include baby-sitter.

sitter (noun)	babysitter (noun)
a domestic hen ready to brood	a person engaged to care for children when the parents are not home
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