spice

(noun) aromatic substances of vegetable origin used as a preservative.

(noun) any of a variety of pungent aromatic vegetable substances used for flavoring food.

(noun) the property of being seasoned with spice and so highly flavored. Synonyms: spiciness, spicery.

(verb) make more interesting or flavorful. Synonyms: spice up. Example: "Spice up the evening by inviting a belly dancer."

(verb) add herbs or spices to. Synonyms: zest, spice up.