elan vital vs vital force

elan vital and vital force both are nouns.

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

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

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

Other synonyms of elan vital include life force, vitality.

elan vital (noun)	vital force (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