sweetened vs sweet-flavored

sweetened and sweet-flavored both are adjectives.

Word	Noun	Adjective	Verb	Adverb
sweetened	No	Yes	No	No
sweet-flavored	No	Yes	No	No

As adjectives, sweetened and sweet-flavored are synonyms defined as:

Other synonyms of sweetened include sugared, sweet.

sweetened (adjective)	sweet-flavored (adjective)
with sweetening added	with sweetening added