phytology vs phloem

phytology and phloem both are nouns.

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

phytology (noun)	phloem (noun)
the branch of biology that studies plants	(botany) tissue that conducts synthesized food substances (e.g., from leaves) to parts where needed; consists primarily of sieve tubes