botany vs garden

botany and garden both are nouns.

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

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

botany: all the plant life in a particular region or period
garden: the flowers or vegetables or fruits or herbs that are cultivated in a garden

botany (noun)	garden (noun)
the branch of biology that studies plants	a plot of ground where plants are cultivated
all the plant life in a particular region or period	a yard or lawn adjoining a house
	the flowers or vegetables or fruits or herbs that are cultivated in a garden

botany (adjective)	garden (adjective)
	the usual or familiar type

botany (verb)	garden (verb)
	work in the garden