nagger vs common scold

nagger and common scold both are nouns.

Word	Noun	Adjective	Verb	Adverb
nagger	Yes	No	No	No
common scold	Yes	No	No	No

As nouns, nagger and common scold are synonyms defined as:

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

Other synonyms of nagger include nag, scold, scolder.

nagger (noun)	common scold (noun)
someone (especially a woman) who annoys people by constantly finding fault	someone (especially a woman) who annoys people by constantly finding fault