All of the words in the English language are divided into nine categories: article, noun, adjective, pronoun, verb, adverb, preposition, conjunction, and interjection. Of all of these, the noun is the most important, as all others are more or less dependent upon it. A noun signifies the name of any person, place, or thing, in fact, anything of which we can have either thought or idea. There are two kinds of nouns: proper and common. Common nouns are names which belong in common to a race or class, as "man" or "city." Proper nouns distinguish individual members of a race or class, such as "John" or "Philadelphia." In the former case, man is a name which belongs in common to the whole race of mankind, and city is common to all large centers of population, but "John" signifies a particular individual of the race, while "Philadelphia" denotes a particular one from among the cities of the world. The word "flower" is ...