common scold vs nagger

common scold and nagger both are nouns.

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

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

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

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

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