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You should never write “doublecheck” as one word.
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Since both dictionaries chose to include the hyphen, that shows it’s officially recognized as part of the word and should not be dropped. Usually, when dictionaries provide definitions with hyphens, we can make more sense of the word. However, there is no mention of using it without the hyphen in either dictionary. It is written as a phrasal verb and teaches us about the meaning.
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In The Cambridge Dictionary and the Oxford Dictionary, “double-check” is also listed with the hyphen. You should make sure to follow these simple rules when you want to get it right. We use it as a hyphenated form because that’s common practice in English. Since it’s officially recognized with the hyphen, there is no need to write it as one or two words.Īccording to Google Ngram Viewer, “double-check” is by far the most popular choice of the three listed options. We use it to make sure that something is correct or safe, and it is most commonly written with the hyphen. “Double-check” is a hyphenated phrasal verb. However, it would help to know whether it’s a hyphenated word or split into one or two words. If we can make sure something is correct before final submission, we guarantee success. “Double-checking” is an important thing to do in many practices.
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