blemish vs daub

blemish and daub both are nouns.

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

As nouns, daub is a hyponym of blemish; that is, daub is a word with a more specific, narrower meaning than blemish:

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

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

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