Clarification
Part of speech: noun
Definition: The act of clarifying; the act or process of making clear or transparent by freeing visible impurities; particularly, the clearing or fining of liquid substances from feculent matter by the separation of the insoluble particles which prevent the liquid from being transparent. The act of freeing from obscurities.
Example sentence: Every clarification breeds new questions.
Illumination
Part of speech: noun
Definition: The act of illuminating, or supplying with light; the state of being illuminated.Festive decoration of houses or buildings with lights.Adornment of books and manuscripts with colored illustrations. See illuminate (transitive verb).
Example sentence: Towards the end of February 1928, I took the decision of using brilliant monochromatic illumination obtained by the aid of the commercially available mercury arcs sealed in quartz tubes.