One Word Substitution

One word substitution means replacing a long descriptive phrase with a single word that has the same meaning. For example, instead of saying "a person who teaches", you can simply say "teacher".

What You'll Learn

• How to replace a descriptive phrase with a single, precise word
• Common one word substitutions for people, places, and things
• How to recognise when a phrase can be shortened to one word
• How to use these substitutions correctly in sentences

When to Use

1. When describing a person by what they do: "The baker made fresh bread for the neighbourhood." (Instead of "the person who bakes bread")
2. When naming a place by its purpose: "We returned the books to the library." (Instead of "the place where books are kept")
3. When describing an object by what it does: "The telescope helped us see the stars clearly." (Instead of "an instrument used for seeing things far away")
4. When replacing a long phrase in your writing: "The orphan was raised by kind neighbours." (Instead of "the child whose parents have died")
5. When making your sentences shorter and clearer: "The audience clapped loudly after the performance." (Instead of "the group of people watching a show")

How to Form

People -- By What They Do

Places -- By Their Purpose

Things and Concepts

Key Rules

1. One word must carry the full meaning: The substitute word should capture the main idea of the entire phrase. "A person who teaches" becomes "teacher" because "teacher" already means someone who teaches.

2. Be precise -- choose the closest match: If the phrase says "a person who flies an aeroplane", the answer is "pilot", not "traveller". A traveller sits on the plane; a pilot flies it.

3. Watch out for similar-sounding substitutions: "Physician" means a doctor, while "physicist" means a person who studies physics. Read the phrase carefully before choosing your answer.

4. Some substitutions are about the person, not the action: "An orphan" describes a child whose parents have died -- it is about the child's situation, not something the child does.

5. The substitution must fit the sentence: If the sentence says "The __ landed at Changi Airport", and the phrase is "the vehicle that flies through the air", the correct word is "aeroplane", not "helicopter" or "bird".

6. Learn common patterns: Many people-substitutions end in -er, -or, -ist, or -ian. Recognising these endings helps you spot the right answer. For example, teach + -er = teacher, act + -or = actor, science + -ist = scientist, music + -ian = musician.

Common Mistakes

Clue Words

Phrases that describe people

a person who, someone who, one who, a man/woman who

Phrases that describe places

a place where, a building where, a room where

Phrases that describe things or concepts

a journey that, an instrument used for, a book that, a list of, a group of

Common word endings for people

-er (teacher, baker), -or (actor, doctor), -ist (scientist, artist), -ian (musician, physician), -eer (engineer, volunteer)

Tip: When you see "a person who..." in a question, look at what the person does. The action word usually hides inside the answer. "A person who teaches" -- the word "teaches" leads you straight to "teacher"!

Practice Tips

1. Action-to-word shortcut: For people-substitutions, find the action word in the phrase and think of the person who does that action. "Bakes" leads to "baker". "Flies an aeroplane" leads to "pilot". The action is your biggest clue.

2. Place-to-purpose match: For places, ask yourself "What happens here?" A library is where you borrow books. A hospital is where sick people are treated. Match the purpose to the place name.

3. Read the full phrase carefully: Do not stop at the first few words. "A place where animals are kept" could be a farm or a zoo. The extra words "for people to visit" tell you the answer is "zoo".

4. Build a substitution list: Keep a notebook of one word substitutions you come across. Group them by type -- People, Places, Things. Review your list before tests.

Quick Reference