referee vs refereeing

referee and refereeing both are nouns.

Word	Noun	Adjective	Verb	Adverb
referee	Yes	No	Yes	No
refereeing	Yes	No	No	No

referee (noun)	refereeing (noun)
(sports) the chief official (as in boxing or American football) who is expected to ensure fair play	the act of umpiring
someone who reads manuscripts and judges their suitability for publication
an attorney appointed by a court to investigate and report on a case

referee (verb)	refereeing (verb)
evaluate professionally a colleague's work
be a referee or umpire in a sports competition