smudge vs blot

smudge and blot both are nouns.

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

As nouns, smudge and blot are synonyms defined as:

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

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

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