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So I've thought of a name for something, but cannot decide on how I should write it. In School, I vaguely remember someone saying "when you want to say something as one word, when it's really two words, then you hyphenate them", which leads me to believe I should be writing it like "Side-note". But How should you really write it, when it is going to be the name of something?

Are Sidenote, Side-note, and Side Note all correct? Which version should I use?

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closed as not constructive by FumbleFingers, Will Hunting, MετάEd, Robusto, StoneyB Nov 14 '12 at 5:27

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

possible duplicate of To hyphenate or not?. I actually think this is Not Constructive, since there's no absolute rule about which pairings can be joined into a single word or hyhenated, and it's pointless having "votes" here about each specific case. Follow a style guide if you have one, or search Google Books and copy whatever the majority do. Or just make your own decision. – FumbleFingers Nov 14 '12 at 0:26
@FumbleFingers: So, basically what you're saying is that neither of the choices in my question are incorrect? Also, I don't care about the voting system, or what the majority of others are doing, I care about using the correct version, and if none of them are incorrect, then you could've just said so, and used that as an answer. – Arrow Nov 14 '12 at 0:32
That wasn't exactly what I meant, but after following my own advice, I'll just note that "as a side note" is about 30 times more common in Google Books than the single-word version. GB indexes hyphens as spaces, but if you follow that link I think you'll agree most people don't hyphenate it. I don't actually understand why you're including variable capitalisation here. – FumbleFingers Nov 14 '12 at 0:37
@F: Looks like three versions of title case to me. There's actually a 4th: "Side-Note", and whether this one or "Side-note" is "correct" is a matter of which style manual is used. – user21497 Nov 14 '12 at 2:43
Possible duplicate of "Sidenote for Mac" – Jim Nov 14 '12 at 7:33
up vote 2 down vote accepted

From Merriam-Webster's 3rd Unabridged:

Main Entry : sidenote
: a note of reference that is set in the side margin or a page usually in smaller type than the text

This is standard American English.

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