What is the noun form of Able?

The noun (person, place, thing, or quality) form of “able” is the word “ability,” which is, thus, the quality or state of being “able” due to being in possession of the means of being capable of, fit for and worthy of doing something. Your “ability” to do something is the fact that you are “able” to do it.

See further detail related to it here. Keeping this in consideration, is able a noun or verb?

a•bly, adv. able is an adjective that usually comes after some form of be, ably is an adverb, ability is a noun:John is able to run fast. -able is used to form adjectives from verbs, with the meaning "capable of, fit for, tending to'': teach + -able → teachable (= capable of being taught);

Additionally, what is the verb for Able? Verb. able (third-person singular simple present ables, present participle abling, simple past and past participle abled)

In this manner, what is noun form of happy?

(uncountable) The emotion of being happy; joy. (archaic, uncountable) prosperity, thriving, wellbeing.

Is ability a noun verb or adjective?

-ability, suffix. -ability, a combination of -able and -ity, is used to form nouns from adjectives that end in -able:capable (adjective) → capability (noun); reliable (adjective) → reliability (noun).