radiobiology vs biology

radiobiology and biology both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiobiology	Yes	No	No	No
biology	Yes	No	No	No

As nouns, biology is a hypernym of radiobiology; that is, biology is a word with a broader meaning than radiobiology:

radiobiology: the branch of biology that studies the effects of radiation on living organisms
biology: the science that studies living organisms

Other hypernyms of radiobiology include biological science.

radiobiology (noun)	biology (noun)
the branch of biology that studies the effects of radiation on living organisms	the science that studies living organisms
	all the plant and animal life of a particular region
	characteristic life processes and phenomena of living organisms