Adrenalin vs neurotransmitter

Adrenalin and neurotransmitter both are nouns.

Word	Noun	Adjective	Verb	Adverb
Adrenalin	Yes	No	No	No
neurotransmitter	Yes	No	No	No

As nouns, neurotransmitter is a hypernym of Adrenalin; that is, neurotransmitter is a word with a broader meaning than Adrenalin:

Adrenalin: a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action
neurotransmitter: a neurochemical that transmits nerve impulses across a synapse

Other hypernyms of Adrenalin include pressor, vasoconstrictive, vasoconstrictor.

Adrenalin (noun)	neurotransmitter (noun)
a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action	a neurochemical that transmits nerve impulses across a synapse