daub vs blemish

daub and blemish both are nouns.

Word	Noun	Adjective	Verb	Adverb
daub	Yes	No	Yes	No
blemish	Yes	No	Yes	No

As nouns, blemish is a hypernym of daub; that is, blemish is a word with a broader meaning than daub:

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

Other hypernyms of daub include defect, mar.

daub (noun)	blemish (noun)
an unskillful painting	a mark or flaw that spoils the appearance of something (especially on a person's body)
a blemish made by dirt
material used to daub walls

daub (verb)	blemish (verb)
cover (a surface) by smearing (a substance) over it	add a flaw or blemish to; make imperfect or defective
coat with plaster	mar or impair with a flaw
apply to a surface	mar or spoil the appearance of