Ease may be either of condition or of action; facility is always of action; readiness is of action or of expected action. Facility is always active; readiness may be active or passive; the speaker has facility of expression, readiness of wit; any appliance is in readiness for use.

J. C. Fernald, English Synonyms and Antonyms (1914)

Example sentences

capacity Mr Brown was acting in the capacity of ambassador.
capability No one knows Morocco's true combat capability.
amenity The health spa was the hotel’s primary amenity.
installation A reboot is required to complete the installation.

Popularity over time

Word	1850 → 2019	Trend
facility		steady
capacity		falling
capability		falling
amenity		falling
adroitness		falling
installation		falling

Use in printed books, per decade from 1850 to 2019.

By length

4 letters: ease¹
5 letters: touch¹, skill¹, craft¹, knack¹
6 letters: talent²
7 letters: ability⁴, address², freedom², faculty³, prowess², amenity⁴, pliancy
8 letters: capacity⁴, resource²
9 letters: advantage³, technique², readiness³, appliance³, dexterity⁴, quickness², ductility⁴, adeptness
10 letters: capability⁵, competence³, adroitness
11 letters: flexibility⁵, convenience³, proficiency⁴
12 letters: installation⁴

The small number after each word is its number of syllables (talent² = 2 syllables).

In other languages

Français: commodité
Español: comodidad
Català: comoditat