Have you ever paused while writing a survey or form because you weren’t sure whether it should be questionaire or questionnaire? You’re not alone. Thousands of people search for this spelling question every month because the two words look almost identical.
The good news is that the answer is simple: questionnaire is the correct spelling, while questionaire is a common misspelling. In this guide, you’ll learn why the confusion exists, how to remember the correct spelling, when to use the word, and practical examples that will help you avoid this mistake forever.
The Correct Spelling: Questionnaire
The correct English word is questionnaire.
A questionnaire is a written or digital list of questions designed to collect information, opinions, feedback, or research data from people.
Examples include:
- Customer satisfaction questionnaires
- Employee feedback questionnaires
- Medical questionnaires
- Academic research questionnaires
- Market research questionnaires
Example Sentences
- Please complete the questionnaire before your appointment.
- The researcher distributed a detailed questionnaire to 500 participants.
- Our company uses an online questionnaire to gather customer feedback.
Is “Questionaire” a Real Word?
No.
Questionaire is not a recognized English word. It appears because people accidentally leave out one of the letters while spelling questionnaire.
Modern dictionaries and style guides recognize only questionnaire as the correct spelling.
Questionaire or Questionnaire: Quick Comparison
| Feature | Questionaire | Questionnaire |
| Correct spelling | No | Yes |
| Found in dictionaries | No | Yes |
| Accepted in professional writing | No | Yes |
| Used in surveys and research | No | Yes |
The winner is clear: always use questionnaire.
Why Is “Questionnaire” So Difficult to Spell?
There are several reasons why people often misspell this word.
1. Silent Letter Patterns
English contains many silent or unusual letter combinations that make spelling challenging.
2. French Origin
The word comes from French, which explains its distinctive spelling.
The ending -naire is borrowed directly from French and appears in only a limited number of English words.
3. Pronunciation Doesn’t Match the Spelling
When spoken, many people hear something close to:
kwes-chuh-nair
Since the extra n isn’t emphasized clearly, many writers naturally drop it.
Meaning of Questionnaire
A questionnaire is a structured collection of questions used to obtain information from individuals.
It may be:
- Printed on paper
- Sent through email
- Completed online
- Conducted through mobile apps
- Used in interviews
Questionnaires are essential tools across many industries.
Common Uses of Questionnaires
Education
Teachers and researchers use questionnaires to:
- Measure learning outcomes
- Gather student opinions
- Conduct academic research
Healthcare
Hospitals and clinics often ask patients to complete questionnaires regarding:
- Medical history
- Allergies
- Lifestyle habits
- Current symptoms
Business
Companies rely on questionnaires to collect:
- Customer feedback
- Employee satisfaction
- Product reviews
- Market research data
Marketing
Marketing teams use questionnaires to understand:
- Consumer preferences
- Buying behavior
- Brand awareness
- Customer expectations
Origin of the Word
The word questionnaire originated from the French language.
It combines the concept of question with the French suffix -naire, which often indicates something related to a collection or purpose.
The word entered English during the 19th century and has retained its original spelling ever since.
Easy Trick to Remember the Correct Spelling
A simple memory trick is this:
Question + naire = Questionnaire
Notice that there are two consecutive “n” letters before the ending.
Another helpful reminder:
Think of the word as containing “question” first.
Question
naire
=
Questionnaire
Avoid shortening it to questionaire.
Common Spelling Mistakes
People frequently write:
- Questionaire
- Questionnarie
- Questionnare
- Questionairee
- Questioneer
Only this spelling is correct:
Questionnaire
Questionnaire vs Survey
Although people often use these terms interchangeably, they are not exactly the same.
Questionnaire
A questionnaire is the actual list of questions.
Survey
A survey is the overall process of collecting and analyzing responses.
Think of it this way:
- The questionnaire is the tool.
- The survey is the entire research activity.
Examples in Everyday Life
You probably encounter questionnaires more often than you realize.
Examples include:
- Hospital registration forms
- Job application forms
- Online customer feedback forms
- Hotel satisfaction forms
- University research studies
- Government census forms
- Product review requests
Each of these typically includes a questionnaire.
Why Correct Spelling Matters
Using the correct spelling demonstrates professionalism and attention to detail.
Incorrect spelling may:
- Reduce credibility
- Create a poor first impression
- Lower the quality of academic work
- Affect business communication
- Cause spelling software to flag your writing
Whether you’re writing an email, preparing research, or designing a survey, always choose questionnaire.
Practical Tips to Avoid the Mistake
Follow these simple habits:
- Remember that questionnaire contains double “n.”
- Think of the word beginning with question.
- Use spell-check before publishing.
- Read the word slowly when proofreading.
- Practice writing it a few times until it becomes familiar.
Examples of Correct Usage
Here are some examples in context.
Academic
“The professor distributed a questionnaire to collect student opinions.”
Healthcare
“Please complete the medical questionnaire before seeing the doctor.”
Business
“Our customer questionnaire helps improve our services.”
Human Resources
“Every new employee fills out an onboarding questionnaire.”
Marketing
“The company created an online questionnaire for product research.”
Common Grammar Questions
Is questionnaire a noun?
Yes.
It is a countable noun.
Examples:
- one questionnaire
- several questionnaires
Can questionnaire be plural?
Yes.
The plural form is:
Questionnaires
Example:
“The researchers reviewed hundreds of questionnaires.”
Is questionnaire formal?
Yes.
It is commonly used in:
- Academic writing
- Business communication
- Government documents
- Healthcare
- Professional reports
Key Takeaways
- Questionnaire is the only correct spelling.
- Questionaire is a common spelling mistake.
- A questionnaire is a list of questions used to collect information.
- The word comes from French, which explains its unusual spelling.
- Remember the pattern: Question + naire.
Frequently Asked Questions
Is it questionaire or questionnaire?
The correct spelling is questionnaire. Questionaire is an incorrect spelling and should not be used in professional or academic writing.
Why do people spell questionnaire as questionaire?
Most people omit one of the letters because the pronunciation doesn’t clearly emphasize the double n, making the incorrect spelling seem reasonable.
What does questionnaire mean?
A questionnaire is a structured set of questions used to collect information, opinions, or feedback from respondents.
Is questionnaire British or American English?
The spelling questionnaire is correct in both British English and American English. There is no regional spelling difference.
Is questionaire accepted by dictionaries?
No. Major English dictionaries recognize only questionnaire as the correct spelling.
How can I remember the spelling of questionnaire?
Think of the word as Question + naire. Remember that it contains two consecutive “n” letters, which helps distinguish it from the incorrect spelling.
Conclusion
If you’ve ever wondered whether to write questionaire or questionnaire, the answer is straightforward: questionnaire is the only correct spelling. While the incorrect version is a common typo, using the proper form is essential for clear, professional communication.
Whether you’re creating a customer feedback form, conducting academic research, or filling out medical paperwork, spelling questionnaire correctly helps you communicate with confidence. Keep the simple memory trick—Question + naire—in mind, and you’ll never have to second-guess this word again.
