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In the US, coworker is normally not hyphenated. However in the UK, it is usually co-worker.
British English and U.S. English Hyphen Usage
There are some differences in the manner in which the hyphen is used in the United Kingdom and in the United States, although these differences actually are rather minimal. For example, in the UK certain prefixes will be hyphenated when they will not be so separated in the US. For another example, the word preschool in the US is hyphenated pre-school in the UK.
What else can I help you with?
Should you hyphenate coworker?
Yes it should be hyphenated: co-worker.
Is outsourced one word two words or hyphenated?
in-house - two words, hyphenated.
Is well being one word or is it hyphenated?
It should be hyphenated.
Is year end one word or two or hyphenated?
Hyphenated
Should ongoing be hyphenated?
No it shouldn't be hyphenated. It is one word.
Is life giving one word?
It is a hyphenated adjective, life-giving.
Is coordinate hyphenated or one word?
Coordinate is one word.
Is reuse one word or hyphenated?
"Reuse" is one word.
What hyphenated word starts with the letter O?
One-half is a hyphenated word. It begins with the letter O.
Is the phrase 'end-product' hyphenated?
Yes, end-product is hyphenated. It is a noun and treated as one word which is hyphenated.
Is wholeheartedly a hyphenated word?
No, "wholeheartedly" is one word.
Is heartbeat a hyphenated word?
No...heartbeat is one word.
