algology vs botany

algology and botany both are nouns.

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

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

Other hypernyms of algology include phytology.

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