biology vs botany

biology and botany both are nouns.

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

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

biology (noun)	botany (noun)
the science that studies living organisms	the branch of biology that studies plants
all the plant and animal life of a particular region	all the plant life in a particular region or period
characteristic life processes and phenomena of living organisms