plant hormone vs phytohormone

plant hormone and phytohormone both are nouns.

Word	Noun	Adjective	Verb	Adverb
plant hormone	Yes	No	No	No
phytohormone	Yes	No	No	No

As nouns, plant hormone and phytohormone are synonyms defined as:

plant hormone and phytohormone: (botany) a plant product that acts like a hormone

Other synonyms of plant hormone include growth regulator.

plant hormone (noun)	phytohormone (noun)
(botany) a plant product that acts like a hormone	(botany) a plant product that acts like a hormone