flavors

This soda contains unnatural chemical flavors.
Since scent/smell/odor/essence/fragrance are all synonyms of flavor, I wonder if I could substitute them for flavor here. Thanks.

flavor is perceived through the mouth

scent/smell/odor/essence/fragrance are perceived through the nose

I don't think you can say they are synonymous.

Thanks, Anglika.
But my dictionary says they are all equivalent, and I doubted it. That's why I posted it to ask your opinions.

Dictionaries vary a lot. Do you ever use this: OneLook Dictionary Search ??

It gives access to a good range of options.