valency vs biology

valency and biology both are nouns.

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

valency (noun)	biology (noun)
(chemistry) a property of atoms or radicals; their combining power given in terms of the number of hydrogen atoms (or the equivalent)	the science that studies living organisms
(biology) a relative capacity to unite or react or interact as with antigens or a biological substrate	all the plant and animal life of a particular region
the phenomenon of forming chemical bonds	characteristic life processes and phenomena of living organisms