Credibility vs Validity

When to use each in English, with meaning, register, and examples.

Credibility

Top 2,000 (common)C1noun

Validity

FormalTop 5,000 (fairly common)C1noun
Most formal: ValidityMost common: Credibility
 CredibilityValidity
Pronunciation🇬🇧 /["/ˌkredəˈbɪləti/"]/🇺🇸 /["/ˌkredəˈbɪləti/"]/🇬🇧 /["/vəˈlɪdəti/"]/🇺🇸 /["/vəˈlɪdəti/"]/
MeaningHow much people believe in someone or something.how true or acceptable something is
ExampleThe politician's credibility was damaged by the scandal.The period of validity of the agreement has expired.
RegisterNeutralFormal
How commonTop 2,000 (common)Top 5,000 (fairly common)
CEFR levelC1C1
Part of speechnounnoun
Collocationsgreat, high, real, carry, have, be lacking in, suffer, gap, issue, problem, credibility  among, credibility  as, credibility  forgreat, equal, doubtful, have, give something, lend something, of… validity, validity  for, great, equal, doubtful, have, give something, lend something, of… validity, validity  for
Antonymsuntrustworthiness, doubt, suspicioninvalidity, falseness
Common mistakesConfused with 'creditability' which has a different meaning., Used as a verb instead of a noun., Omitting the context, making it unclear what the credibility refers to.Confused with 'valid' which is an adjective., Using 'validity' in a casual context., Mispronouncing it with emphasis on the second 'a' instead of the first.
Usage notesUsed when discussing trustworthiness, often in formal contexts such as academia or journalism. Avoid in casual conversations.Use 'validity' in academic or legal contexts. Avoid in casual conversations as it sounds too formal.

Frequently asked questions: Credibility vs Validity

What's the difference between Credibility and Validity?

Credibility: How much people believe in someone or something. Validity: how true or acceptable something is

Which is more formal: Credibility and Validity?

Validity is the most formal of these.

Which is more common: Credibility and Validity?

Credibility is the most common in everyday English.

Are Credibility and Validity the same CEFR level?

Credibility: C1, Validity: C1 on the CEFR scale.

What part of speech are Credibility and Validity?

Credibility: noun, Validity: noun.

Can you show an example of each?

Credibility: The politician's credibility was damaged by the scandal. Validity: The period of validity of the agreement has expired.

Can I use Credibility and Validity interchangeably?

Not always. Credibility and Validity are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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