[{"Bold_text": "noun", "List Items": ["something that incites to action or exertion or quickens action, feeling, thought, etc.:The approval of others is a potent stimulus.Synonyms: provocation , motive , enticement , incitement Antonyms: discouragement", "Physiology, Medicine/Medical.something that excites an organism or part to functional activity.Synonyms: stimulant"]}]