blot vs smudge

blot and smudge both are nouns.

Word	Noun	Adjective	Verb	Adverb
blot	Yes	No	Yes	No
smudge	Yes	No	Yes	No

As nouns, blot and smudge are synonyms defined as:

Other synonyms of blot include daub, slur, smear, smirch, spot.

blot (noun)	smudge (noun)
an act that brings discredit to the person who does it	a blemish made by dirt
a blemish made by dirt	a smoky fire to drive away insects

blot (verb)	smudge (verb)
dry (ink) with blotting paper	make a smudge on; soil by smudging
make a spot or mark onto