Updated on December 08, 2025

Compound Nouns

Compound adjectives are descriptive forms made up of two or more words that function together as a single adjective. They are commonly written with a hyphen (-) to show that the elements form one unified idea. These structures allow speakers and writers to express complex descriptions efficiently and with greater precision, which is why they are especially frequent in formal writing, journalism, academic contexts, and advanced spoken English.

Table of Contents

Exercises

Explanation

1. Position of compound adjectives in a sentence

Compound adjectives follow the same placement rules as regular adjectives. They usually:

  • appear before a noun, or

  • follow linking verbs such as be, seem, feel, appear, look.

Examples:

She works for a high-risk investment firm.
The proposal seems well-prepared.
His explanation sounded overly complicated.

2. Common structural patterns

Compound adjectives can be formed in several ways. One frequent pattern combines descriptive words to produce a single meaning.

Adjective / adverb + past participle

Examples:

a widely accepted theory
a poorly written article
a carefully planned strategy

In these cases, the adverb modifies how the action was performed, while the past participle describes the result.

3. Compound adjectives with numbers

A very productive and common structure uses numbers to describe length, quantity, age, or duration.

Structure: number + singular noun + hyphen

Even when the meaning is plural, the noun remains singular because the whole expression acts as one adjective.

Examples:

a 20-minute delay
a six-month contract
a four-hour workshop

a six-months contract (incorrect)

4. Difference between compound adjectives and descriptive phrases

It is important to distinguish compound adjectives from full descriptive phrases.

Compare:

We rented a two-bedroom apartment.
The apartment has two bedrooms.

The first example uses a compound adjective before the noun.The second is a standard sentence, not an adjective.

5. Compound adjectives describing physical features (-ed forms)

When a compound adjective describes what someone or something has, especially physical characteristics, the ending -ed is typically used.

Structure: number + body part + -ed

Examples:

a three-headed sculpture
a short-legged table
a broad-shouldered athlete

These forms describe permanent or visible features rather than actions.

Related topics
Learn English Online - ESL Games, Tests, Grammar and Vocabulary Lessons
@ 2025 learnenglish1-2-1.com