officiant vs officiate

officiant is a noun but officiate is not a noun.

Word	Noun	Adjective	Verb	Adverb
officiant	Yes	No	No	No
officiate	No	No	Yes	No

officiant (noun)	officiate (noun)
a clergyman who officiates at a religious ceremony or service

officiant (verb)	officiate (verb)
	perform duties attached to a particular office or place or function
	act in an official capacity in a ceremony or religious ritual, such as a wedding