W: (v) function [Related to: functionary] (perform duties attached to a particular office or place or function) "His wife officiated as his private secretary"
S: (n) official (someone who administers the rules of a game or sport) "the golfer asked for an official who could give him a ruling"
Adjective
S: (adj) official (having official authority or sanction) "official permission"; "an official representative"
S: (adj) official (of or relating to an office) "official privileges"
W: (n) office [Related to: official] (an administrative unit of government) "the Central Intelligence Agency"; "the Census Bureau"; "Office of Management and Budget"; "Tennessee Valley Authority"
S: (adj) established, constituted (brought about or set up or accepted; especially long established) "the established social order"; "distrust the constituted authority"; "a team established as a member of a major league"; "enjoyed his prestige as an established writer"; "an established precedent"; "the established Church"