Practice
Acronyms and abbreviations: understand the difference
A work message says, "Please contact the HR team." Do you read HR as a word or as two letters? The sound gives you a useful clue.
Tell whether a short form is a general abbreviation, an acronym said as a word, or an initialism said letter by letter.
Read and practice
Read the examples and try the written questions in this guide. Listening recordings are not available for this lesson yet.
Try the written questions
NATO is an acronym. /ˈneɪtəʊ ɪz ən ˈækrənɪm/
The short answer
Every acronym is an abbreviation, but not every abbreviation is an acronym. An acronym comes from initial letters and is said as one word; a general abbreviation may simply shorten a word, and an initialism is said letter by letter.
NATO is an acronym, Dr. is an abbreviation of Doctor, and BBC is an initialism.
Why it works: All three are shorter forms, but their source and pronunciation are different.
5 more examples
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NATO is often pronounced as one word.
The initial letters form an acronym because speakers say them together as a word.
Not this:The BBC is usually pronounced
B-B-C. What changes: BBC is an initialism because each letter is said separately. -
Dr. Kim will see the next patient.
Dr. shortens the single word Doctor, so it is an abbreviation.
Not this:The manager asked the
HRteam for an update. What changes: HR shortens a phrase and is commonly said as two letter names. -
Please check the FAQ before you email the support team.
FAQ comes from a phrase and is usually spoken as three letters.
Not this:The
laserwas repaired before the demonstration. What changes: Laser began as an initial-letter short form, but English speakers say it as an ordinary word. -
The appointment is at 3 p.m.
This is a conventional written abbreviation for a time of day.
Not this:The station has an
ATMnear the entrance. What changes: ATM is made from initial letters and is normally said A-T-M. -
The note says that the package will arrive ASAP.
ASAP is an abbreviation of a phrase. Speakers may say it as letters or as a word, depending on the speaker and setting.
Not this:The report uses the shortened form
approx.before an estimated number. What changes: Approx. shortens one word, approximate, so it is an abbreviation but not an acronym.
Read the full guide
Imagine reading a notice at a clinic. You may see Dr. before a name, an acronym such as UNICEF in a poster, and an initialism such as NHS on a sign. You do not need to learn every label first. Start by asking what longer word or phrase the short form replaces, then listen for whether people say a word or separate letters.
Start with the broad word
When you see a short form, abbreviation is the broad word to use. It can shorten one word, such as Dr. for Doctor, or a longer phrase. This first label helps because it includes several different kinds of shortening.
The note says, "Meet me at the dept. office."
Dept. is short for department. It is an abbreviation even though it does not come from the first letters of a phrase.
Is every abbreviation made from initial letters?
No. Dr., dept., and approx. are abbreviations that shorten a word.
Hear an acronym as a word
An acronym usually begins with the initial letters of a longer phrase, then becomes a pronounceable word. NATO is a useful example. You do not say N-A-T-O in ordinary speech. You say it as one word.
NATO is discussed in the news as one spoken word.
The letters are still visible in writing, but the pronunciation is like a normal word.
What sound clue points to an acronym in the narrow sense?
You can say the letters together as one word.
Say an initialism letter by letter
An initialism also uses initial letters, but it is pronounced one letter at a time. Say B-B-C, A-T-M, or F-A-Q. The letter names are part of the spoken form, so do not force them into a word.
I used the ATM outside the bank.
ATM is normally spoken as A-T-M. It is an initialism and also an abbreviation.
How would you usually say FAQ aloud?
Say the three letter names: F-A-Q.
Use the clearest label
If a teacher or task asks for a careful distinction, use acronym for a word such as NATO and initialism for letters such as BBC. In many ordinary conversations, people call both acronyms. That broader use is common, so say how the form is pronounced when you need to avoid confusion.
BBC is an initialism because speakers say three letter names.
Calling it an abbreviation is always safe because initialisms and acronyms belong to that larger group.
Which broad label includes both BBC and NATO?
Both are abbreviations.
Keep short forms clear
Short forms save space, but the reader still needs to know what they mean. In a report for people who may not know a term, write the full name first and put the short form after it. Later, use the short form on its own. Keep capital letters and punctuation consistent with the rules for that piece of writing.
The Human Resources (HR) team will send the schedule. HR will answer questions tomorrow.
The first sentence explains HR before the second sentence uses the shorter form alone.
What can you do before using an unfamiliar short form several times?
Write the full name first, followed by the short form.
Before you go
Remember this
Use abbreviation for any shortened word or phrase. Use acronym for initial letters said as a word, and initialism for initial letters said one by one. When the label matters, listen to how people say the short form.
Practice with the written examples
You can practice with the written questions in the Learn tab. Each answer includes an explanation.
Try the written questionsListening test not available yet
This lesson does not have the recordings needed for a listening test. Use the written questions in the guide to check your understanding.
Try the written questionsQuestions about "Acronyms and abbreviations: understand the difference"
What is the difference between an acronym and an abbreviation?
An abbreviation is any shortened form of a word or phrase. An acronym is a kind of abbreviation made from initial letters and pronounced as a word. For example, Dr. is an abbreviation of Doctor, while NATO is an acronym.
NATO is often pronounced as one word.
Is every acronym an abbreviation?
Yes. Acronym is a more specific word within the broader group of abbreviations. A short form such as NATO is an abbreviation because it shortens a longer name, and it is also an acronym because speakers say the initial letters as one word.
The BBC is usually pronounced B-B-C.
What is an initialism?
An initialism is a short form built from the initial letters of a phrase that speakers say one by one. BBC, ATM, and FAQ are common examples. Initialisms are abbreviations, but they are usually kept separate from acronyms when the difference in pronunciation matters.
Dr. Kim will see the next patient.
Why do some people call BBC an acronym?
People do not all use the word acronym in the same narrow way. In careful teaching, BBC is an initialism because people say B-B-C. In broader everyday use, acronym can include both word-like forms and letter-by-letter forms. Saying how it is pronounced makes the meaning clear.
The manager asked the HR team for an update.
Should I write the full name before an abbreviation?
Write the full name first when your readers may not know the short form. For example, a report can introduce Human Resources (HR), then use HR later. This gives readers the meaning before the shorter form appears on its own.
Please check the FAQ before you email the support team.
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