dressing down vs going-over

dressing down and going-over both are nouns.

Word	Noun	Adjective	Verb	Adverb
dressing down	Yes	No	No	No
going-over	Yes	No	No	No

As nouns, dressing down and going-over are synonyms defined as:

Other synonyms of dressing down include bawling out, castigation, chewing out, earful, upbraiding.

dressing down (noun)	going-over (noun)
a severe scolding	a careful and thorough inspection
	a severe scolding