What's the Difference Between an -Ing Noun and a Real Noun

The difference between an -ing noun and a real noun They thought that Tom would bring a big development for this small town. They thought that Tom would bring a big developing for this small town.

"developing" is not a noun. It's the form of a verb called the gerund, and it has a dual nature; one of a verb and one of a substantive. Its verbal nature is shown by: a) its ability to take a direct and an indirect object. b) the fact that it can have a subject (I was proud of him being my son). c)its ability to appear in different tenses (he boasted of his having killed her) Its substantival nature is shown by: a) its ability to be the object of a preposition (by doing so) b) the fact that it can take a plural ending (such going-ons) c) it can take an attributive adjective (his dangerous driving) d) its ability to take a definite or an indefinite article (a hanging was once a public amusement) The active form of a gerund is often used in a passive sense (your hair wants cutting, the garden needs weeding) In parallel cases a noun ending in e.g. -ment would normally imply the result of an action, the product of an action while the corresponding gerund would refer to the action itself. Take for instance "extension" vs. "extent" or "export" vs. "exportation. A gerund would normally have in it the verbal nature which the corresponding noun need or does not have. Compare "The king's arrival was met with much enthusiasm" vs. "We are quite tired of his usual arriving very late". In the case of "developing" one might compare "The new president aims at developing the country's poor-relief system" vs. "The development of AIDS in Africa has proved to be one of the biggest tragedies in the Third World" It's true that you can sometimes generate a noun by adding -ing, like with "an understanding". It's not a universal rule, but in general, you can generate a noun that refers to the process of the verb — "a developing" sounds odd to me, but other examples, like "a ripening" (as in we can observe the ripening of the fruit) work for me. But my main point is that even if you can generate an -ing noun from a verb, there's no reason to assume it would mean the same thing as a noun ending with -ment generated from the same verb. To respond directly to your first sentence, it's not that some verbs have a corresponding noun, but rather that many verbs have many corresponding gerunds. If they always meant the same thing, we wouldn't need different suffixes Not only is there no reason to assume that it wouldn't mean the same thing; it is in fact safe to say that it won't. In morphology, there's that phenomenon called blocking. When two ways of creating a word conflict, the existence of one blocks the other. Since we already have the word development, the process to form the word developing to mean "development" is blocked. If it does get created nonetheless, then with a different meaning, or in a different register, or in a specific jargon.

You cannot use any word anywhere you feel like, while writing in English. That is the sophistication of English language. There are certain terms to describe certain moods. The noun form of verbs by adding "-ing" are called gerunds. These should be used at the appropriate situations. It's OK to use developing as a noun (for example, developing is one of the stages of the photographic process), and the second sentence here is grammatical. The reason it sounds strange, to this native speaker at least, is partly because the whole concept is a little fuzzy†, but mostly because we have a perfectly good and common alternative to developing: development. In cases where there is no alternative, the sentence sounds fine: They thought that Tom would bring a big restructuring for this small town. Does development mean the general improvement and growth of the town, or does it refer to a single major development such as a shopping mall. If it is the latter, then developing is not possible. I think you have got it wrong. Development is the noun form as in "That's a big development". But you cannot say that's a big developing. Developing is the gerund form of the verb develop, which can be used as an adjective. "Developing nations should form a committee..." That said, developing is a noun but not the one you think.