norepinephrine vs catecholamine

norepinephrine and catecholamine both are nouns.

Word	Noun	Adjective	Verb	Adverb
norepinephrine	Yes	No	No	No
catecholamine	Yes	No	No	No

As nouns, catecholamine is a hypernym of norepinephrine; that is, catecholamine is a word with a broader meaning than norepinephrine:

norepinephrine: a catecholamine precursor of epinephrine that is secreted by the adrenal medulla and also released at synapses
catecholamine: any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland

Other hypernyms of norepinephrine include pressor, vasoconstrictive, vasoconstrictor, monoamine neurotransmitter.

norepinephrine (noun)	catecholamine (noun)
a catecholamine precursor of epinephrine that is secreted by the adrenal medulla and also released at synapses	any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland