blotter vs blotting paper

blotter and blotting paper both are nouns.

Word	Noun	Adjective	Verb	Adverb
blotter	Yes	No	No	No
blotting paper	Yes	No	No	No

As nouns, blotter and blotting paper are synonyms defined as:

blotter (noun)	blotting paper (noun)
the daily written record of events (as arrests) in a police station	absorbent paper used to dry ink
absorbent paper used to dry ink