tasty vs bittersweet

tasty is not a noun while bittersweet is a noun.

Word	Noun	Adjective	Verb	Adverb
tasty	No	Yes	No	No
bittersweet	Yes	Yes	No	No

tasty (noun)	bittersweet (noun)
	twining shrub of North America having yellow capsules enclosing scarlet seeds
	poisonous perennial Old World vine having violet flowers and oval coral-red berries; widespread weed in North America

tasty (adjective)	bittersweet (adjective)
pleasing to the sense of taste	tinged with sadness
	having a taste that is a mixture of bitterness and sweetness