sweetening vs enhancement

sweetening and enhancement both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweetening	Yes	No	No	No
enhancement	Yes	No	No	No

As nouns, sweetening and enhancement are synonyms defined as:

sweetening and enhancement: an improvement that makes something more agreeable

sweetening (noun)	enhancement (noun)
the act of adding a sweetener to food	an improvement that makes something more agreeable
an improvement that makes something more agreeable
something added to foods to make them taste sweeter