pteridology vs botany

pteridology and botany both are nouns.

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

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

Other hypernyms of pteridology include phytology.

pteridology (noun)	botany (noun)
the branch of botany that studies ferns	the branch of biology that studies plants
	all the plant life in a particular region or period