daub vs slur

daub and slur both are nouns.

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

As nouns, daub and slur are synonyms defined as:

Other synonyms of daub include blot, smear, smirch, smudge, spot.

daub (noun)	slur (noun)
an unskillful painting	a blemish made by dirt
a blemish made by dirt	a disparaging remark
material used to daub walls	(music) a curved line spanning notes that are to be played legato

daub (verb)	slur (verb)
cover (a surface) by smearing (a substance) over it	become vague or indistinct
coat with plaster	utter indistinctly
apply to a surface	speak disparagingly of; e.g., make a racial slur
	play smoothly or legato