monoamine oxidase vs enzyme

monoamine oxidase and enzyme both are nouns.

Word	Noun	Adjective	Verb	Adverb
monoamine oxidase	Yes	No	No	No
enzyme	Yes	No	No	No

As nouns, enzyme is a hypernym of monoamine oxidase; that is, enzyme is a word with a broader meaning than monoamine oxidase:

monoamine oxidase: an enzyme that catalyzes the oxidation of many body compounds (e.g., epinephrine and norepinephrine and serotonin)
enzyme: any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions

monoamine oxidase (noun)	enzyme (noun)
an enzyme that catalyzes the oxidation of many body compounds (e.g., epinephrine and norepinephrine and serotonin)	any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions