whipping boy vs scapegoat

whipping boy and scapegoat both are nouns.

Word	Noun	Adjective	Verb	Adverb
whipping boy	Yes	No	No	No
scapegoat	Yes	No	No	No

As nouns, whipping boy and scapegoat are synonyms defined as:

whipping boy and scapegoat: someone who is punished for the errors of others

whipping boy (noun)	scapegoat (noun)
someone who is punished for the errors of others	someone who is punished for the errors of others