phytohormone vs kinin

phytohormone and kinin both are nouns.

Word	Noun	Adjective	Verb	Adverb
phytohormone	Yes	No	No	No
kinin	Yes	No	No	No

As nouns, kinin is a hyponym of phytohormone; that is, kinin is a word with a more specific, narrower meaning than phytohormone:

phytohormone: (botany) a plant product that acts like a hormone
kinin: any of a class of plant hormones that promote cell division and delay the senescence of leaves

Other hyponyms of phytohormone include auxin, gibberellin, cytokinin.

phytohormone (noun)	kinin (noun)
(botany) a plant product that acts like a hormone	any of a class of plant hormones that promote cell division and delay the senescence of leaves