official vs ump

official and ump both are nouns.

Word	Noun	Adjective	Verb	Adverb
official	Yes	Yes	No	No
ump	Yes	No	No	No

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

official (noun)	ump (noun)
someone who administers the rules of a game or sport	an official at a baseball game
a worker who holds or is invested with an office

official (adjective)	ump (adjective)
having official authority or sanction
of or relating to an office
verified officially
(of a church) given official status as a national or state institution
conforming to set usage, procedure, or discipline