“Aroma” is the connotation of the word “smell” in the above sentence.
All the words “aroma,” “stench,” “scent” and “fragrance” are related to smell but of different types. “Aroma” basically defines the smell from the food mixed with that of flowers contributing to building the ambiance of a place. “Stench” on the other hand is a foul and unpleasant smell. “Scent” and “fragrance” both are equivalent words to define the sweet and pleasant smell especially smell of flowers, perfumes etc.