euthenics vs life science

euthenics and life science both are nouns.

Word	Noun	Adjective	Verb	Adverb
euthenics	Yes	No	No	No
life science	Yes	No	No	No

As nouns, life science is a hypernym of euthenics; that is, life science is a word with a broader meaning than euthenics:

euthenics: the study of methods of improving human well-being and efficient functioning by improving environmental conditions
life science: any of the branches of natural science dealing with the structure and behavior of living organisms

Other hypernyms of euthenics include bioscience.

euthenics (noun)	life science (noun)
the study of methods of improving human well-being and efficient functioning by improving environmental conditions	any of the branches of natural science dealing with the structure and behavior of living organisms