Often, facilities.

something designed, built, installed, etc., to serve a specific function affording a convenience or service

transportation facilities; educational facilities; a new research facility.

something that permits the easier performance of an action, course of conduct, etc.

to provide someone with every facility for accomplishing a task; to lack facilities for handling bulk mail.

readiness or ease due to skill, aptitude, or practice; dexterity

to compose with great facility.

ready compliance

Her facility in organizing and directing made her an excellent supervisor.

an easy-flowing manner

facility of style.

the quality of being easily or conveniently done or performed.

Often, facilities. Informal . a rest room, esp. one for use by the public, as in a theater or restaurant.

freedom from difficulty, controversy, misunderstanding, etc.

facility of understanding.

noun

difficulty , hardness

noun

address , adroitness , aptitude , bent , child’s play , competence , dexterity , efficiency , effortlessness , expertness , fluency , knack , leaning , lightness , poise , proficiency , propensity , quickness , readiness , skill , skillfulness , smoothness , smooth sailing , spontaneity , tact , turn , [[witnotes:a facility is a building or place that provides a particular service or is used for a particular industry or a skillful performance or ability without difficulty; faculty is one of the inherent cognitive or perceptual powers of the mind or the body of teachers and administrators at a school]] , accommodation , advantage , aid , amenity , appliance , comfort , equipment , fitting , material , means , opportunity , resource , [[toolnotes:a facility is a building or place that provides a particular service or is used for a particular industry or a skillful performance or ability without difficulty; faculty is one of the inherent cognitive or perceptual powers of the mind or the body of teachers and administrators at a school]] , easiness , facileness , fluidity , convenience , ability , capability , ease , east , pliability