plant hormone vs kinin

plant hormone and kinin both are nouns.

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

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

plant hormone: (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 plant hormone include auxin, gibberellin, cytokinin.

plant hormone (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