A compound noun is any noun that is made up of two or more different words. It is a mixture of words that are meaningful. It can also be defined as ‘a noun, an adjective, or a verb made of two or more words, joined by a hyphen.
Types of Compound Nouns-
1. Spaced or Open Compound Noun
A spaced or open compound noun is one in which there is a space between the two words which form the compound noun.
2. Hyphenated Compound Nouns
A hyphenated compound noun is one in which the two words are separated with the use of a hyphen (-). There is no space between the words.
3. Closed or Solid Compound Nouns
A closed or solid compound noun is one in which the two words do not have neither spaces nor hyphens separating them. They are usually considered as a single word.
100 Common Compound nouns: