sharp-worded vs tart

sharp-worded is not a noun while tart is a noun.

Word	Noun	Adjective	Verb	Adverb
sharp-worded	No	Yes	No	No
tart	Yes	Yes	No	No

As adjectives, sharp-worded and tart are synonyms defined as:

Other synonyms of sharp-worded include sharp.

sharp-worded (noun)	tart (noun)
	a small open pie with a fruit filling
	a pastry cup with a filling of fruit or custard and no top crust
	a woman who engages in sexual intercourse for money

sharp-worded (adjective)	tart (adjective)
harsh	tasting sour like a lemon
	harsh