phytohormone vs plant hormone

phytohormone and plant hormone both are nouns.

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

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

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

Other synonyms of phytohormone include growth regulator.

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