Noun

(wikipedia expertise) (-)

Great skill or knowledge in a particular field or hobby

The scientist has expertise in the field of nuclear fusion.

* 2014 , Michael White, " Roll up, roll up! The Amazing Salmond will show a Scotland you won't believe", The Guardian , 8 September 2014:

He spoke of Scotland's hydroelectric projects in Africa, local expertise shared with the world's poor.

advice, or opinion, of an expert

Noun

(facilities)

The fact of being easy, or easily done; absence of difficulty, simplicity.

*, II.12:

Clytomachus'' affirmed, that he could never understand by the writings of ''Carneades'', what opinion he was of. Why hath ''Epicurus interdicted facility unto his Sectaries?

Dexterity of speech or action; skill, talent.

The facility she shows in playing the violin is unrivalled.

The physical means or contrivances to make something (especially a public service) possible; the required equipment, infrastructure, location etc.

Transport facilities in Bangkok are not sufficient to prevent frequent traffic collapses during rush hour.

* {{quote-book, year=2006, author=(Edwin Black)

, chapter=1, title= Internal Combustion , passage=As though on an incendiary rampage, the fires systematically devoured the contents of Edison's headquarters and facilities .}}

(North America, in the plural) A toilet.