agronomist vs agronomy

agronomist and agronomy both are nouns.

Word	Noun	Adjective	Verb	Adverb
agronomist	Yes	No	No	No
agronomy	Yes	No	No	No

agronomist (noun)	agronomy (noun)
an expert in soil management and field-crop production	the application of soil and plant sciences to land management and crop production