amendment [amendments](correction or addition to a law) noun [UK: ə.ˈmend.mənt] [US: ə.ˈmend.mənt]This is a very significant amendment. = Esta es una enmienda muy significativa.
improvement [improvements](act of improving) noun [UK: ɪm.ˈpruːv.mənt] [US: ˌɪm.ˈpruːv.mənt]