nag vs scold

nag and scold both are nouns.

Word	Noun	Adjective	Verb	Adverb
nag	Yes	No	Yes	No
scold	Yes	No	Yes	No

As nouns, nag and scold are synonyms defined as:

nag and scold: someone (especially a woman) who annoys people by constantly finding fault

Other synonyms of nag include common scold, nagger, scolder.

nag (noun)	scold (noun)
an old or over-worked horse	someone (especially a woman) who annoys people by constantly finding fault
someone (especially a woman) who annoys people by constantly finding fault

nag (verb)	scold (verb)
remind or urge constantly	censure severely or angrily
bother persistently with trivial complaints	show one's unhappiness or critical attitude
worry persistently