biology vs forestry

biology and forestry both are nouns.

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

As nouns, forestry is a hyponym of biology; that is, forestry is a word with a more specific, narrower meaning than biology:

biology: the science that studies living organisms
forestry: the science of planting and caring for forests and the management of growing timber

biology (noun)	forestry (noun)
the science that studies living organisms	the science of planting and caring for forests and the management of growing timber
all the plant and animal life of a particular region
characteristic life processes and phenomena of living organisms