An ethic is a set of moral principles that guides behaviour, as in a strong work ethic. An ethos is the characteristic spirit or values of a person, culture, or organisation, as in the company's ethos of teamwork. Ethic is about the rules you follow; ethos is about the overall character that surrounds them.
The core difference
Ethic refers to specific moral principles guiding conduct; ethos refers to the broader spirit or values that characterise a person or group.
- ethic — a set of moral principles guiding behaviour: She has a strong work ethic.
- ethos — the characteristic spirit, values, or beliefs of a person or organisation: Teamwork is at the heart of the company's ethos.
How to tell them apart
Both words come from the same Greek root for character, but they've settled into different jobs in English. Ethic tends to name a specific principle or code, often paired with a describing word, as in a work ethic or a professional ethic. Ethos is broader, describing the overall spirit or feel of a group, an institution, or a culture.
One extra sense worth knowing: in rhetoric, ethos specifically means an appeal to the speaker's credibility or authority, distinct from appeals to logic or emotion. Ethic doesn't carry this rhetorical meaning, so if you're discussing persuasive technique, ethos is the word you want.
