There are several synonyms for the phrase "add seasoning to", including "season", "flavor", "spice", and "enhance". These words all mean to add or sprinkle ingredients to a dish in order to improve its taste. "Season" is the most commonly used term and can refer to adding salt, pepper, or other herbs and spices. "Flavor" is useful for describing dishes that need a specific taste, such as adding lemon to a fish dish. "Spice" refers to adding stronger, bolder flavors like cumin or chili powder. "Enhance" means to improve or intensify the existing flavors of a dish, often by adding complementary ingredients.