celebrant vs merrymaker

celebrant and merrymaker both are nouns.

Word	Noun	Adjective	Verb	Adverb
celebrant	Yes	No	No	No
merrymaker	Yes	No	No	No

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

Other hyponyms of celebrant include reveler, reveller.

celebrant (noun)	merrymaker (noun)
an officiating priest celebrating the Eucharist	a celebrant who shares in a noisy party
a person who is celebrating