taxonomy vs biology

taxonomy and biology both are nouns.

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

taxonomy (noun)	biology (noun)
practice of classifying plants and animals according to their presumed natural relationships	the science that studies living organisms
(biology) study of the general principles of scientific classification	all the plant and animal life of a particular region
a classification of organisms into groups based on similarities of structure or origin etc	characteristic life processes and phenomena of living organisms