NOUN

Agent nouns

Main article: Agent noun

Agent nouns are usually common nouns (although they may be proper nouns, such as in titles or adopted surnames) that take the form of a subject (typically a person) performing an action (verb). Examples in English are maker (from to make), teacher (from to teach), and actor and actress (from to act).

Countable and uncountable nouns

Main articles: Count noun and Mass noun

Count nouns are common nouns that can take a plural, can combine with numerals or quantifiers (e.g., one, two, several, every, most), and can take an indefinite article (a or an). Examples of count nouns are chair, nose, and occasion.
Mass nouns (or non-count nouns) differ from count nouns in precisely that respect: they can't take plural or combine with number words or quantifiers. Examples from English include laughter, cutlery, helium, and furniture. For example, it is not possible to refer to a furniture or three furnitures. This is true even though the pieces of furniture comprising furniture could be counted. Thus the distinction between mass and count nouns should not be made in terms of what sorts of things the nouns refer to, but rather in terms of how the nouns present these entities.^[12][13]

Collective nouns

Main article: Collective noun

Collective nouns are nouns that refer to groups consisting of more than one individual or entity, even when they are inflected for the singular. Examples include committee, herd, and school (of fish). These nouns have slightly different grammatical properties than other nouns. For example, the noun phrases that they head can serve as the subject of a collective predicate, even when they are inflected for.

Concrete nouns and abstract nouns

Further information: physical body and abstract object

Concrete nouns refer to physical entities that can, in principle at least, be observed by at least one of the senses (for instance, chair, apple, Janet or atom). Abstract nouns, on the other hand, refer to abstract objects; that is, ideas or concepts (such as justice or hatred). While this distinction is sometimes exclusive, some nouns have multiple senses, including both concrete and abstract ones; consider, for example, the noun art, which usually refers to a concept (e.g., Art is an important element of human culture) but which can refer to a specific artwork in certain contexts (e.g., I put my daughter's art up on the fridge).
Some abstract nouns developed etymologically by figurative extension from literal roots. These include drawback, fraction, holdout, and uptake. Similarly, some nouns have both abstract and concrete senses, with the latter having developed by figurative extension from the former. These include view, filter, structure, and key.
In English, many abstract nouns are formed by adding noun-forming suffixes (-ness, -ity, -ion) to adjectives or verbs. Examples are happiness (from the adjective happy), circulation (from the verb circulate) and serenity (from the adjective serene).

Noun phrases

Main article: Noun phrase

A noun phrase is a phrase based on a noun, pronoun, or other noun-like word (nominal) optionally accompanied by modifiers such as adjectives.

Pronouns

Main article: Pronoun

Nouns and noun phrases can typically be replaced by pronouns, such as he, it, which, and those, in order to avoid repetition or explicit identification, or for other reasons. For example, in the sentence Janet thought that he was weird, the word he is a pronoun standing in place of the name of the person in question. The English word one can replace parts of noun phrases, and it sometimes stands in for a noun. An example is given below:

John's car is newer than the one that Bill has.

But one can also stand in for bigger sub parts of a noun phrase. For example, in the following example, one can stand in for new car.

This new car is cheaper than that one.

Substantive as a word for noun

"Substantive" redirects here. For other uses, see Substance (disambiguation).

Starting with old Latin grammars, many European languages use some form of the word substantive as the basic term for noun (for example, Spanish sustantivo, "noun"). Nouns in the dictionaries of such languages are demarked by the abbreviation s. or sb. instead of n, which may be used for proper nouns instead. This corresponds to those grammars in which nouns and adjectives phase into each other in more areas than, for example, the English term predicate adjective entails. In French and Spanish, for example, adjectives frequently act as nouns referring to people who have the characteristics of the adjective. The most common metalanguage to name this concept is nominalization. An example in English is:

This legislation will have the most impact on the poor.

Similarly, an adjective can also be used for a whole group or organization of people:

The Socialist International.

Hence, these words are substantives that are usually adjectives in English.
The word nominal also overlaps in meaning and usage with noun'23' and adjective.