daub vs mortar

daub and mortar both are nouns.

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

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

Other hyponyms of daub include render-set, parget, roughcast, mud.

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

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