officiating vs officiate

officiating is a noun but officiate is not a noun.

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

officiating (noun)	officiate (noun)
the act of umpiring

officiating (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