Ketchup vs Sauce

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

Ketchup

Top 1,000 (very common)

Sauce

Top 1,000 (very common)A2noun
 KetchupSauce
Pronunciation🇬🇧 //ˈkɛtʃəp//🇺🇸 //ˈkɛtʃəp//🇬🇧 /["/sɔːs/"]/🇺🇸 /["/sɔːs/"]/
MeaningA sweet, thick sauce made from tomatoes.A liquid used to add flavor to food.
ExampleI like to put ketchup on my fries.tomato/cranberry/chilli sauce
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR level-A2
Part of speechnoun
Collocationsketchup bottle, ketchup packets, ketchup and friesthick, thin, buttery, make, prepare, reduce, boat, bottle, in sauce, with sauce
Antonymsmustard, vinaigretteplainness, blandness, dryness
Common mistakesConfused with 'catsup' – both refer to the same condiment., Using 'ketchup' as a verb - it's only a noun., Assuming all ketchup is tomato-based - some variations exist.Confusing 'sauce' with 'sours' which refers to a different culinary concept., Using 'sauce' as a verb incorrectly, which is not standard., Mispronouncing it as 'sos' instead of 'saws'.
Usage notesCommonly used in casual dining and fast-food settings. Less appropriate in formal dining or culinary discussions.Commonly used in cooking and dining. Use 'sauce' for both sweet (like chocolate sauce) and savory (like tomato sauce) dishes. Avoid using in very formal contexts where specific sauces may be needed.

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Ketchup

Frequently asked questions: Ketchup vs Sauce

What's the difference between Ketchup and Sauce?

Ketchup: A sweet, thick sauce made from tomatoes. Sauce: A liquid used to add flavor to food.

Can you show an example of each?

Ketchup: I like to put ketchup on my fries. Sauce: tomato/cranberry/chilli sauce

Can I use Ketchup and Sauce interchangeably?

Not always. Ketchup and Sauce 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.