mortar vs daub

mortar and daub both are nouns.

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

As verbs, daub is a hypernym of mortar; that is, daub is a word with a broader meaning than mortar:

Other hypernyms of mortar include plaster.

mortar (noun)	daub (noun)
a muzzle-loading high-angle gun with a short barrel that fires shells at high elevations for a short range	an unskillful painting
a bowl-shaped vessel in which substances can be ground and mixed with a pestle	a blemish made by dirt
used as a bond in masonry or for covering a wall	material used to daub walls

mortar (verb)	daub (verb)
plaster with mortar	cover (a surface) by smearing (a substance) over it
	coat with plaster
	apply to a surface