Customary vs Familiar

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

Customary

Top 3,000 (common)B1adjective

Familiar

Top 1,000 (very common)B1adjective
Most common: Familiar
 CustomaryFamiliar
Pronunciation🇬🇧 //ˈkʌstəməri//🇺🇸 //ˈkʌstəmˌɛri//🇬🇧 /["/fəˈmɪliə(r)/"]/🇺🇸 /["/fəˈmɪliər/"]/
MeaningSomething that is usual or expected.Well-known or recognized.
ExampleIt is customary to shake hands when meeting someone.My grandmother's cooking is very familiar to me because I grew up eating her dishes.
RegisterNeutralNeutral
How commonTop 3,000 (common)Top 1,000 (very common)
CEFR levelB1B1
Part of speechadjectiveadjective
Collocationscustomary practice, customary law, customary behaviorbe, feel, look, extremely, fairly, very, to, be, seem, become, extremely, fairly, very
Antonymsunusual, unexpectedunfamiliar, unknown
Common mistakesConfusing with 'customize', which means to modify., Using 'customary' inappropriately for uncommon practices., Mixing up with 'habitual', which implies personal habits rather than societal norms.Confusing 'familiar' with 'family' due to similar spelling., Using 'familiar' without the appropriate preposition (to) after it., Using 'familiarly' in the wrong context.
Usage notesUse 'customary' when describing behavior or practices that are widely accepted; it’s neutral but may sound slightly formal in casual contexts.Use 'familiar' in both formal and informal contexts. It's appropriate when talking about something you know well. Avoid using it for professional situations where you need to exhibit more formality.

Frequently asked questions: Customary vs Familiar

What's the difference between Customary and Familiar?

Customary: Something that is usual or expected. Familiar: Well-known or recognized.

Which is more common: Customary and Familiar?

Familiar is the most common in everyday English.

Are Customary and Familiar the same CEFR level?

Customary: B1, Familiar: B1 on the CEFR scale.

Can I use Customary and Familiar interchangeably?

Not always. Customary and Familiar 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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