scrub vs botany

scrub and botany both are nouns.

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

As nouns, botany is a hypernym of scrub; that is, botany is a word with a broader meaning than scrub:

Other hypernyms of scrub include flora, vegetation.

scrub (noun)	botany (noun)
the act of cleaning a surface by rubbing it with a brush and soap and water	the branch of biology that studies plants
dense vegetation consisting of stunted trees or bushes	all the plant life in a particular region or period

scrub (adjective)	botany (adjective)
(of domestic animals) not selectively bred

scrub (verb)	botany (verb)
wash thoroughly
clean with hard rubbing
postpone indefinitely or annul something that was scheduled