An article is a word used to modify a noun, which is a person, place, object, or idea. Technically, an article is an adjective, which is any word that modifies a noun. Usually adjectives modify nouns through description, but articles are used instead to point out or refer to nouns.

Compound words are formed when two or more words are joined together to create a new word that has an entirely new meaning. For example, “sun” and “flower” are two different words, but when fused together, they form another word, Sunflower.