Behaviour vs Behavior | What’s the difference?

Alis Mihaela

Words in English can be interesting because they change, especially based on where you are. A neat example is the spelling differences, like “behaviour vs behavior.” Even though they mean the same thing, we spell them differently if we’re talking in American or British English.

What are Spelling and Regional Variations?

Behavior (American English): Americans like to keep things simple, so they drop the ‘u’ in “behavior.”

Behaviour (British English): The British, on the other hand, prefer to stick to the original spelling, keeping that ‘u’ right before the ‘r.’

Regional OriginAmerican EnglishBritish English
Spelling ConventionSimplifiedPreserved

How to Use in Formal and Informal Contexts?

Behavior: Americans use “behavior” everywhere, whether it’s a formal letter or a casual conversation.

Behaviour: The Brits reserve “behaviour” for more formal situations, giving it a polished touch.

AspectBehavior UsageBehaviour Usage
FormalityFormal and InformalPrimarily Formal
VersatilityVersatileFormal, Less Informal

Consistency in Writing:

Behavior: Easy to spell and easy to be consistent, “behavior” is straightforward.

Behaviour: While it keeps things traditional, “behaviour” can be a bit tricky when it comes to keeping things consistent globally.

AspectConsistency with Spelling
Ease of UseHigh
Global ConsistencyMay Pose Challenges



  • “The kid’s behavior in class was excellent.”
  • “The scientist watched the behavior of the new species.”


  • “In professional settings, following proper workplace behaviour is crucial.”
  • “The British royal family is expected to show impeccable behaviour at public events.”

What is the difference between “Behavior” and “Behaviour”?

The difference lies in regional variations. In American English, it’s “behavior,” keeping it simple, while in British English, it’s “behaviour,” preserving the original spelling. Use them based on your location or writing context.

When to Use Behaviour and Behavior?

Understanding when to use “behaviour” and “behavior” depends on the context and the part of speech.

Let’s explore their usage in various parts of speech with examples:


  • Behavior:
    • “The dog’s behavior was unpredictable.”
    • “His behavior at the meeting was quite impressive.”
  • Behaviour:
    • “The teacher praised the student for his excellent behaviour in class.”
    • “The company promotes ethical behaviour among its employees.”


Behavior (As a verb, use the American English spelling):

  • “She decided to behavior differently in similar situations.”
  • “The child behaviored in a way that surprised everyone.”

Behaviour (As a verb, use the British English spelling):

  • “He has always behaved responsibly in challenging circumstances.”
  • “It is important to behaviour appropriately in formal settings.”



  • “The therapist discussed the child’s behavior patterns.”
  • “The new employee’s behavior analysis skills were commendable.”


  • “The manager appreciated the team’s behaviour during the project.”
  • “Proper behaviour management is crucial in customer service.”


Behavior (As an adverb, use the American English spelling):

  • “He performed the task behaviorally well.”
  • “The child responded behaviorally to the new environment.”

Behaviour (As an adverb, use the British English spelling):

  • “She completed the assignment behaviourally in line with the guidelines.”
  • “The team collaborated behaviourally to achieve the project goals.”

Collective Noun:


  • “The behavior of the crowd at the concert was enthusiastic.”
  • “The committee discussed the collective behavior of the organization.”


  • “The behaviour of the flock was fascinating to observe.”
  • “The school monitors the behaviour of students during lunchtime.”


In conclusion, the gap between “behavior” and “behaviour” is mainly about where you are – America or Britain. Whether you prefer the simple American way or the traditional British style, it depends on the context and where you’re speaking. So, whether you’re talking about a dog’s actions or how a team behaves, these differences make language more interesting.