smudge vs mar

smudge and mar both are nouns.

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

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

smudge: 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 smudge include blemish, defect.

smudge (noun)	mar (noun)
a blemish made by dirt	a mark or flaw that spoils the appearance of something (especially on a person's body)
a smoky fire to drive away insects

smudge (verb)	mar (verb)
make a smudge on; soil by smudging	destroy or injure severely
	make imperfect