-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.

culpability
1. A state of guilt.
2. In explanations and predictions of human action and inaction culpability is a measure of the degree to which an agent; such as, a person, can be held morally or legally responsible.
3. Culpability marks the dividing line between moral evil, like murder, for which someone may be held responsible; and natural evil, like earthquakes, for which no one can be held responsible.
4. From a legal perspective, culpability describes the degree of one's blameworthiness in the commission of a crime or offense.

Except for strict liability crimes, the type and severity of punishment often follow the degree of culpability.

cultivable (adjective), more cultivable, most cultivable
Capable of undergoing cultivation: cultivable land.
curability (s) (noun) (no plural)
The possibility of being healed: "The diagnosis of the doctor indicated that he was convinced of Helen's curability with certain medications and other medical treatments."
damnability
deflagrability (s) (noun), deflagrabilities (pl)
The quality or state of igniting and burning up: The bark of the cork oak is a natural material which has a fire resistant quality and therefore its deflagrability is minimal.

The deflagrability of other dry plants that are dry is very fast and often uncontrollable.

demonstrable (adjective), more demonstrable, most demonstrable
1. Descriptive of being obvious or easy to recognized: Gwen was telling demonstrable lies so often that no one could believe her even when she was telling the truth.
2. Capable of being shown to exist or to be true: There was demonstrable proof that the neighbor set the fire to his house so he could collect the insurance.
denumerable (adjective), more denumerable, most denumerable
That which can be totaled up: There are many denumerable things; for example, denumerable sins, denumerable assets, denumerable words, etc.
deplorability
Deserving censure or contempt; wretched: "The deplorability of their living conditions are too hard to describe."
desirability
1. The quality of being worthy of desiring.
2. Attractiveness to the opposite sex.
detestable (adjective), more detestable, most detestable
1. Pertaining to causing or deserving intense dislike.
2. Relating to inspiring abhorrence or scorn.
3. Referring to what elicits or deserves strong dislike, distaste, or revulsion.
disability (s) (noun), disabilities (pl)
1. A condition in which someone is unable to perform because of physical or mental incompetence.
2. A medically diagnosed condition that makes it difficult to engage in the activities of daily life.
3. A condition; such as, an illness or an injury, which damages or limits people's physical or mental abilities or functions: "The family members have learned to keep positive attitudes about their disabilities."
4. A sum of money paid to somebody, usually on a monthly basis, by a government agency or insurance company because a person is unable to work or to provide for the necessities of life: "After their mother injured her back, she had to quit her job and go on disability."
duplicability
durability (s) (noun), durabilities (pl)
Permanence by virtue of the ability or power to resist wear, pressure, or damage: It is well-known that there ia a durability of plastics for many items.

Automobiles are known for their durability if they are serviced properly.

educability
Capacity for being educated.
electrical instability
An incessant or unrelenting status of unwanted self-oscillation in an amplifier or other electric circuit.