official vs skilled worker

official and skilled worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
official	Yes	Yes	No	No
skilled worker	Yes	No	No	No

As nouns, skilled worker is a hypernym of official; that is, skilled worker is a word with a broader meaning than official:

Other hypernyms of official include skilled workman, trained worker.

official (noun)	skilled worker (noun)
someone who administers the rules of a game or sport	a worker who has acquired special skills
a worker who holds or is invested with an office

official (adjective)	skilled worker (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