phytology vs botany

phytology and botany both are nouns.

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

As nouns, phytology and botany are synonyms defined as:

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