Many English learners, students, writers, and even native speakers wonder whether the correct spelling is questionnaire or questionaire. Because these two spellings look almost identical, they are frequently confused in writing. However, only one spelling is correct in standard English. The correct spelling is questionnaire, while questionaire is a common misspelling.
The word questionnaire is widely used in education, healthcare, business, research, marketing, psychology, government, and everyday communication. It refers to a written or digital set of questions designed to collect information, opinions, feedback, or data from individuals or groups. Whether you’re completing a customer satisfaction questionnaire, a medical questionnaire, or a survey questionnaire, questionnaire is always the correct spelling.
Many people mistakenly write questionaire because they omit one of the “n” letters before the ending -aire. Learning the correct spelling, pronunciation, grammar, examples, etymology, and memory tricks will help you avoid this common spelling mistake.
The spelling questionnaire is the same in both American English and British English, so there are no regional spelling differences to remember.
Quick Answer
| Word | Correct? |
|---|---|
| ✅ Questionnaire | Correct |
| ❌ Questionaire | Incorrect |
Questionnaire means a list of questions used to gather information or feedback.
Examples
- Please complete the questionnaire before your appointment.
- The company sent customers an online questionnaire.
Questionaire is not a correct English spelling.
What Does Questionnaire Mean?
Questionnaire is a noun.
It refers to:
- A form containing questions.
- A survey used to collect data.
- A feedback document.
- A research tool.
- An evaluation form.
Examples
- Every participant completed the questionnaire.
- The teacher handed out a questionnaire.
- The hospital requires a medical questionnaire.
- Researchers analyzed the questionnaire results.
Grammar Role of Questionnaire
Questionnaire functions as a noun.
Common Expressions
- Customer questionnaire
- Survey questionnaire
- Medical questionnaire
- Feedback questionnaire
- Online questionnaire
- Employee questionnaire
- Research questionnaire
- Questionnaire responses
Examples
- We completed an online questionnaire.
- The questionnaire included twenty questions.
Questionnaire in American English
American English always uses questionnaire.
Examples
- Please complete the questionnaire.
- The survey included a detailed questionnaire.
- Customers filled out the questionnaire.
- Researchers reviewed every questionnaire.
- The medical questionnaire was confidential.
Questionnaire in British English
British English also uses questionnaire.
Examples
- Students completed the questionnaire.
- The questionnaire measured public opinion.
- Every patient filled in the questionnaire.
- Researchers distributed the questionnaire.
- The questionnaire was anonymous.
There is no spelling difference between UK and US English.
Questionnaire vs Questionaire Comparison Table
| Feature | Questionnaire | Questionaire |
|---|---|---|
| Correct spelling | ✅ Yes | ❌ No |
| Dictionary word | Yes | No |
| Meaning | List of questions | No meaning |
| Grammar | Noun | Incorrect spelling |
| American English | Correct | Incorrect |
| British English | Correct | Incorrect |
| Professional writing | Recommended | Never use |
Pronunciation Guide
Questionnaire
IPA (UK): /ˌkwes.tʃəˈneə/
IPA (US): /ˌkwes.tʃəˈner/
Pronounced:
kwes-chuh-NAIR
Although the pronunciation may sound like it has only one “n,” the correct spelling contains two consecutive “n” letters.
Why Do People Confuse Questionnaire and Questionaire?
People often write questionaire because:
- They accidentally leave out one of the two “n” letters.
- The pronunciation doesn’t clearly reveal the double “n.”
- The French-style ending -naire can be difficult to remember.
- Fast typing leads to spelling mistakes.
Remember:
Question + naire = Questionnaire
The word contains double “n.”
Word Origin and Etymology
The word questionnaire comes from the French word questionnaire, meaning a list of questions. It entered English in the 19th century and has since become a standard term in research, education, healthcare, and business for collecting information systematically.
Questionnaire Synonyms
| Synonym | Meaning |
|---|---|
| Survey | A set of questions |
| Form | A document to complete |
| Assessment | An evaluation tool |
| Poll | A collection of opinions |
| Checklist | A list for verification |
| Feedback form | A document for responses |
American English Preferences
- Questionnaire
- Survey
- Form
British English Preferences
- Questionnaire
- Survey
- Feedback form
Questionnaire vs Related Words
| Word | Meaning |
|---|---|
| Questionnaire | List of questions |
| Survey | A method of gathering information |
| Form | A document to complete |
| Poll | A vote or opinion survey |
| Assessment | An evaluation |
Examples
- Please complete the questionnaire.
- We conducted a customer survey.
- Fill out the registration form.
- The poll measured public opinion.
Grammar Rule Behind Questionnaire
Always spell the word:
Q-U-E-S-T-I-O-N-N-A-I-R-E
Notice:
- The word contains double “n.”
- The ending is -naire.
Do not write questionaire.
Common Mistakes and Corrections
1. Writing Questionaire
❌ Please complete the questionaire.
✅ Please complete the questionnaire.
2. Missing One “N”
❌ Questionaire
✅ Questionnaire
3. Incorrect Email
❌ Kindly return the completed questionaire.
✅ Kindly return the completed questionnaire.
4. School Assignment Error
❌ Design a customer questionaire.
✅ Design a customer questionnaire.
5. Business Communication Mistake
❌ Employees completed the questionaire.
✅ Employees completed the questionnaire.
6. Healthcare Form Error
❌ Please fill out the medical questionaire.
✅ Please fill out the medical questionnaire.
7. Social Media Mistake
❌ Thanks for completing our questionaire!
✅ Thanks for completing our questionnaire!
Real-Life Examples
Emails
- Please complete the questionnaire before Friday.
- Your questionnaire has been received successfully.
Office
- Employees completed the satisfaction questionnaire.
- HR reviewed every questionnaire.
School
- Students answered the research questionnaire.
- The teacher created a science questionnaire.
Healthcare
- Patients completed a medical questionnaire.
- The questionnaire asked about health history.
Research
- Researchers analyzed questionnaire responses.
- The questionnaire measured consumer preferences.
Everyday Conversation
- I filled out an online questionnaire.
- The survey included a short questionnaire.
American English Example Sentences
- Please complete the questionnaire.
- The customer questionnaire was anonymous.
- We reviewed every questionnaire.
- The questionnaire included multiple-choice questions.
- Students submitted their questionnaires.
- Researchers designed a detailed questionnaire.
- Patients completed a health questionnaire.
- The company emailed a questionnaire.
- Survey results came from the questionnaire.
- The questionnaire helped improve customer service.
British English Example Sentences
- The questionnaire was distributed to all participants.
- Students filled in the questionnaire.
- The questionnaire measured public opinion.
- Every patient received a questionnaire.
- Researchers collected questionnaire responses.
- The survey included a detailed questionnaire.
- The teacher created an online questionnaire.
- Questionnaire data supported the study.
- The questionnaire contained twenty questions.
- Feedback was gathered through a questionnaire.
Memory Tricks to Remember Questionnaire
1. Remember the Double “N”
Think:
Question + naire
There are two “n” letters together.
2. Think of the Base Word
The word begins with:
Question
Then add:
naire
3. Remember the Ending
The correct ending is:
-naire
Not -aire.
4. Break It Into Parts
Question • naire
Notice the double “n.”
5. Write It Three Times
Questionnaire
Questionnaire
Questionnaire
Frequently Asked Questions
Is questionnaire or questionaire correct?
Questionnaire is correct.
What does questionnaire mean?
It means a list of questions used to gather information or feedback.
Is questionaire a word?
No.
How do you spell questionnaire?
Q-U-E-S-T-I-O-N-N-A-I-R-E
Is questionnaire used in British English?
Yes.
Is questionnaire used in American English?
Yes.
How do you pronounce questionnaire?
kwes-chuh-NAIR
Is questionnaire a noun?
Yes.
What are synonyms of questionnaire?
Survey, form, assessment, poll, checklist, and feedback form.
Why is questionaire incorrect?
Because the correct spelling contains double “n” before the ending -aire, making it questionnaire.
People Also Ask
Why do people spell questionnaire as questionaire?
Because they accidentally omit one of the two “n” letters before the ending -aire.
Is questionnaire spelled differently in the UK and the US?
No. Both American English and British English use questionnaire.
What is the easiest way to remember questionnaire?
Think of question + naire and remember that questionnaire contains two consecutive “n” letters.
Is questionnaire formal or informal?
It is suitable for both formal and informal English and is widely used in education, healthcare, research, business, marketing, and government.
Conclusion
Understanding the difference between questionnaire or questionaire is simple once you know the correct spelling. Questionnaire is the only accepted spelling in standard English, while questionaire is a common misspelling caused by leaving out one of the two “n” letters.
The word questionnaire refers to a list of questions used to collect information, opinions, or feedback. It is widely used in research, education, healthcare, customer service, and business. Since American English and British English use the same spelling, there is only one correct form to remember.
A simple memory trick is “Questionnaire = Question + naire.” Remember that the word contains double “n” before the ending -aire. By practicing this spelling, you’ll avoid a common English spelling mistake and write with greater confidence and accuracy.
