rap sheet vs police blotter

rap sheet and police blotter both are nouns.

Word	Noun	Adjective	Verb	Adverb
rap sheet	Yes	No	No	No
police blotter	Yes	No	No	No

As nouns, rap sheet and police blotter are synonyms defined as:

rap sheet and police blotter: the daily written record of events (as arrests) in a police station

Other synonyms of rap sheet include blotter, charge sheet, day book.

rap sheet (noun)	police blotter (noun)
the daily written record of events (as arrests) in a police station	the daily written record of events (as arrests) in a police station