These are two words. There is no hyphen in the concept. In charge means to have leadership in English, so there is no hyphen to connect the two.
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It is not one word if you simply join the two parts, but if you put a hyphen between them, it is: decision-maker. The hyphen is required, because "decision" is too long to be joined to "maker" without a hyphen. Words like rainmaker and peacemaker do not require hyphens, because the word joined to "maker" is short.
No, gift certificate is not a compound or just one word. You just put a space between the two words.
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A hyphen is a "dash" that we use to put a compound word together. Such as 24-hour clock or 42-foot.
Yes, in-home does need a hyphen. It's two words put together to form a word for a different concept.
No, a hyphen is not required.
No, a hyphen is not needed.
Yes. "Hard-working" is a compound adjective, and therefore requires a hyphen between the two words. It is also correct to omit the hyphen and use the single word, "hardworking."
The correct spelling of hyphen is nephyh
No.