* Common Noun: When referring to a general category of aromatic substances used for flavoring food, "spice" is a common noun. For example: "She added a blend of spices to the dish."
* Collective Noun: When referring to a group of different spices, "spice" is a collective noun. For example: "The spice rack was filled with all sorts of exotic spices."
Therefore, the classification of "spice" depends on how it's used in the sentence.