blot vs mar

blot and mar both are nouns.

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

As nouns, mar is a hypernym of blot; that is, mar is a word with a broader meaning than blot:

blot: a blemish made by dirt
mar: a mark or flaw that spoils the appearance of something (especially on a person's body)

Other hypernyms of blot include blemish, defect.

blot (noun)	mar (noun)
an act that brings discredit to the person who does it	a mark or flaw that spoils the appearance of something (especially on a person's body)
a blemish made by dirt

blot (verb)	mar (verb)
dry (ink) with blotting paper	destroy or injure severely
make a spot or mark onto	make imperfect