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Principal vs Principle: What's the Difference?

B2 Similar Spelling

What's the Difference?

Principal" means main or school principal, while "principle" refers to a rule or guideline.

Memory Tip: principal = school leader, principle = rule or idea

principal ends with /-pəl/, principle ends with /-pəl/

principal

noun
The term "principal" refers to the individual who holds the highest authority or leadership position within an organization or institution, often responsible for making key decisions and overseeing operations, particularly in educational settings or corpo
Example:
If the principal had been more supportive, the school might have seen an improvement in student morale.
Common patterns:
principal agent theory principal component analysis principal investigator
principal →

principal

adjective
Most important or main.
Example:
If the principal had been more supportive, the school might have seen an improvement in student morale.
Common patterns:
principal amount principal investigator principal role
principal →

principle

noun
A principle is a fundamental truth or proposition that serves as the foundation for a system of belief or behavior, guiding decisions and actions.
Example:
Although the committee has been discussing the issue for weeks, they have not reached a decision because the principle of fairness must be upheld in all their considerations.
Common patterns:
ethical principle guiding principle fundamental principle
principle →

Common Mistakes

The principle of the school gave a speech at the graduation ceremony.
The principal of the school gave a speech at the graduation ceremony.
The word 'principal' refers to the head of a school.
She always stands by her principal and never compromises.
She always stands by her principle and never compromises.
The word 'principle' refers to a moral rule or belief.

Quick Practice

0/3 correct
1. If the ____ had been more supportive, the school might have seen an improvement in student morale.
2. If the ____ had been more supportive, the school might have seen an improvement in student morale.
3. Although the committee has been discussing the issue for weeks, they have not reached a decision because the ____ of fairness must be upheld in all their considerations.

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