[{"Bold_text": "noun", "List Items": ["an act of improving the state of being improved .", "a change or addition by which a thing is improved .", "a person or thing that represents an advance on another in excellence or achievement:The new landlord is a great improvement over his greedy predecessor.Synonyms: advancement , betterment , refinement", "a bringing into a more valuable or desirable condition, as of land or real property; betterment.Synonyms: enhancement , repair", "something done or added to real property that increases its value.", "profitable use, as of a period of time."]}]