rap sheet vs blotter

rap sheet and blotter both are nouns.

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

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

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

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

rap sheet (noun)	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
	absorbent paper used to dry ink