life force vs elan vital

life force and elan vital both are nouns.

Word	Noun	Adjective	Verb	Adverb
life force	Yes	No	No	No
elan vital	Yes	No	No	No

As nouns, life force and elan vital are synonyms defined as:

life force and elan vital: (biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms

Other synonyms of life force include vital force, vitality.

life force (noun)	elan vital (noun)
(biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms	(biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms