earful vs chewing out

earful and chewing out both are nouns.

Word	Noun	Adjective	Verb	Adverb
earful	Yes	No	No	No
chewing out	Yes	No	No	No

As nouns, earful and chewing out are synonyms defined as:

Other synonyms of earful include bawling out, castigation, dressing down, going-over, upbraiding.

earful (noun)	chewing out (noun)
a severe scolding	a severe scolding
an outpouring of gossip