Life essence can be referred to as the vital force or life force. It is the energy or spirit that gives life to an organism. Another synonym for life essence is vitality, which refers to the physical and mental vigor that enables a person to live a full life. The zest for life is also a synonym for life essence, as it conveys the enthusiasm and excitement that is felt towards one's existence. Other synonyms for life essence include soul, breath, consciousness, and psyche. Each of these words captures a different aspect of the essence of life and can be used interchangeably to refer to the life force that animates living things.