catalyst vs enzyme

catalyst and enzyme both are nouns.

Word	Noun	Adjective	Verb	Adverb
catalyst	Yes	No	No	No
enzyme	Yes	No	No	No

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

catalyst: (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
enzyme: any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions

Other hyponyms of catalyst include biocatalyst, platinum black.

catalyst (noun)	enzyme (noun)
something that causes an important event to happen	any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected