medical science vs life science

medical science and life science both are nouns.

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

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

medical science: the science of dealing with the maintenance of health and the prevention and treatment of disease
life science: any of the branches of natural science dealing with the structure and behavior of living organisms

Other hypernyms of medical science include bioscience.

medical science (noun)	life science (noun)
the science of dealing with the maintenance of health and the prevention and treatment of disease	any of the branches of natural science dealing with the structure and behavior of living organisms