Is there a universally agreed upon way to refer to the corner of a sidewalk? My fingers immediately went to 'streetcorner,' as a compound word, but very few spellcheckers acknowledge this spelling. Merriam-Webster only lists 'street corner,' which would seem to be the end of it, except Wikipedia herself (which I thought had standards for this type of thing) uses "Streetcorner" as the name of the related page, and then both 'street corner' and 'street-corner' throughout. Indeed, while Google searching, only an aggressive quoting strategy will get me anything searched except 'street corner,' but both 'street-corner' and 'streetcorner' will occasionally pop up in autofill suggestions.
So are 'street-corner' or 'streetcorner' correct? 'Street-corner' feels like something only my hyphen-happy brother would use, but I don't know anything any more. And does any of this change when I use it as an adjective, like 'street corner proselytizer,' 'street-corner philosopher' or Rob Thomas's 'Streetcorner Symphony?'