-ability

(Latin: suffix; expressing ability, capacity, fitness, or "that which may be easily handled or managed")

Just a few examples out of hundreds of words presented as the noun forms of -able; forming nouns of quality from, or corresponding to, adjectives in -able; the quality in an agent that makes an action possible. The suffix -ible has related meanings.

absolute permeability (s) (noun), absolute permeabilities (pl)
A measurement of the ability of a fluid; such as, oil, gas, or water, to flow through a rock formation when the formation is at complete saturation.
absorbability (s) (noun), absorbabilities (pl)
1. The state or quality of being able to be wholly interested in something or giving full attention to something or to someone: The absorbability of so much information made him very qualified to complete the project.
2. Being fully involved in doing something that a person wants to achieve: Shirley's absorbabilities while studying at the university resulted in a doctor's degree that was achieved in less time than is normally required.
accountability (s) (noun), accountabilities (pl)
1. Being liable or answerable for something.
2. Responsibility to someone or for some activity.
3. In education: a policy of holding schools and teachers accountable for students' academic progress by linking such progress with funding for salaries, maintenance, etc.
achievability
The state or condition of being achievable.
acquirability (s) (noun), acquirabilities (pl)
The act or fact of being able to be obtained, possessed, or owned: The acquirability of the wonderful piece of art seemed momentarily unobtainable.
adaptability
addressability
1. The ability to write data to different fields, or blocks of memory, within the microchip in an RFID transponder.
2. The ability to address bits, fields, files, or other portions of the data on a tag.
adsorb, adsorbable, adsorbability
To take up and to hold another substance on the surface in order to carry on the process of adsorption.
advisability (s) (noun), advisabilities (pl)
The quality of being able to be worthy of a recommendation; that which is sensible: Karen and Ted discussed with their real estate agent the advisability of buying a home so close to the airport.
affability (s) (noun), affabilities (pl)
The quality of being friendly or easy to get along with; readiness to converse or be addressed; especially, by inferiors or equals; courteousness, civility, openness of manner.
amiability (s) (noun), amiabilities (pl)
amicability (s) (noun), amicabilities (pl)
applicability
Relevance by virtue of being applicable to the matter at hand.
arability (s) (noun), arabilities (pl)
An agricultural or farming area that can supply edible plants: Vegetables, wheat, oats, corn, apples, pears, grapes, peaches, strawberries, and cherries are just a few of the kinds of food which arabilities are used by cultivators of the soil to accomplish the production of more nourishment for people and animals to consume.
assailability (s) (noun), assailabilities (pl)
Vulnerability to forceful assault or susceptibility to injury or physical violence: Too many assailabilities are committed by muggers in cities; especially, at night.