Efficiency is the ability to do something or produce something without wasting materials, time or energy. It is the quality or degree of being efficient. Productivity is the rate at which goods are produced or...

Productivity is the rate at which goods are produced. Production is defined as the act of manufacturing goods for their use or sale.

They both are used for the pleasing effect of the face. Pretty refers more to the outer look as compared to beautiful, which refers to the deep beauty of any person.

Gorgeous sounds more reflective than beautiful, but only relates to the outer appearance of an individual, whereas the word beautiful gives one relief and considers the inner, as well as the outer appearance...

The word cute relates to real charm and attractiveness whereas, pretty refers to real beauty.