(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 (s) (noun), culpabilities /pl)
The extent of one's guilt in an offence or wrongdoing: Except for strict liability crimes, the type and severity of punishment often follow the degree of culpability.

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.

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.

cultivable (adjective), more cultivable, most cultivable
Capable of growing crops or being farmed: Sam was looking for cultivable land which was arable, tillable, and generally productive for the many plants he wanted to have.
curability (s) (noun) (no plural)
The possibility of being healed: The diagnosis of Dr. Smithson indicated that he was convinced of Helen's curability by using certain medications and other medical treatments.
damnability (s) (noun), damnabilities (pl)
The quality of something being strongly condemned or abhorred: The damnability of missing their turnoff on the freeway was completely justified since they had to drive another 100 miles in order to turn around!
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 can be very fast and often uncontrollable.

demonstrable (adjective), more demonstrable, most demonstrable
1. Descriptive of something which is obvious or easy to recognize: 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 be true or to exist: There was demonstrable proof that the neighbor set fire to his house so he could collect the insurance.
denumerable (adjective) (not comparable)
Regarding something that can be totaled or counted up: There are many denumerable things, for example denumerable sins, denumerable assets, denumerable words, etc.
deplorability (s) (noun) (no pl)
Regarding something which deserves censure or contempt; wretched: The deplorability of their living conditions is too miserable and pitiful to describe.
desirability (s) (noun), desirabilities (pl)
1. The quality of worth, advantage, or value: There was a debate in class about the desirability of letting the older students smoke on the playground during recess.
2. Attractiveness to the opposite sex: Grace's desirability for the boys in her class was shown in her conduct and appearance being so appealing, charming, and beautiful.
detestable (adjective), more detestable, most detestable
Descriptive of something or of someone that deserves intense dislike or revulsion: The detestable and abhorrent behavior of the criminal was beyond belief!
disability (s) (noun), disabilities (pl)
1. A condition in which someone is unable to perform because of physical or mental handicaps: When Susan fell on the steps she hurt her foot and, because of this disability, it was not possible for her to stand and make dinner in the kitchen that evening.
2. A medically diagnosed condition that makes it difficult to engage in the activities of daily life: Since Jane's eyesight was getting worse over the years, Dr. Smith said that, because of this disability, it would not be safe for her to drive her car anymore.
3. A condition, such as an illness or an injury, which damages or limits people's physical or mental capacities or functions: Greg's parents have learned to keep up positive attitudes about their son's disabilities which were acquired through a car accident the year before.
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 (s) (noun) (no pl)
1. The quality of being reproducible, either of something written, recorded, or drawn: Jack's photos possessed the features necessary for the duplicability, which were important for his term paper at the end of the semester.
2. The capacity to repeat something that has already been accomplished: Steve's boss agreed to have him work for the same firm abroad and counted on the duplicability of his excellent work in the new country.
durability (s) (noun), durabilities (pl)
Permanence by virtue of the capacity to resist wear, pressure, or damage: It is well known that there is a durability of plastics for many items.

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

educability (s) (noun), educabilities (pl)
The capacity for being taught: Sam's educability was shown through his high level of reading skills, the understanding of facts, and of good conduct and started school at an early age.
electrical instability (s) (noun), electrical instabilities (pl)
An incessant or unrelenting status of unwanted self-oscillation in an amplifier or other electric circuit: At school, Jim understood electrical instability to be a reaction relating to transistors with amorphous indium-gallium-zink oxide which were analyzed with the illumination of light.