amine vs histamine

amine and histamine both are nouns.

Word	Noun	Adjective	Verb	Adverb
amine	Yes	No	No	No
histamine	Yes	No	No	No

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

amine: a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals
histamine: amine formed from histidine that stimulates gastric secretions and dilates blood vessels; released by the human immune system during allergic reactions

Other hyponyms of amine include aminobenzine, aniline, aniline oil, phenylamine, enamine, monoamine, ptomain, ptomaine.

amine (noun)	histamine (noun)
a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals	amine formed from histidine that stimulates gastric secretions and dilates blood vessels; released by the human immune system during allergic reactions