blotch vs smirch

blotch and smirch both are nouns.

Word	Noun	Adjective	Verb	Adverb
blotch	Yes	No	Yes	No
smirch	Yes	No	Yes	No

As nouns, smirch is a hypernym of blotch; that is, smirch is a word with a broader meaning than blotch:

Other hypernyms of blotch include blot, daub, slur, smear, smudge, spot.

blotch (noun)	smirch (noun)
an irregularly shaped spot	an act that brings discredit to the person who does it
	a blemish made by dirt

blotch (verb)	smirch (verb)
mark with spots or blotches of different color or shades of color as if stained	charge falsely or with malicious intent; attack the good name and reputation of someone
	smear so as to make dirty or stained