I'd go a little further. I would suggest that, if you type any text at all for a label, it doesn't even say 'spoiler', thus giving you complete freedom of labeling. Of course, if you don't give it a label, it still says 'Spoiler', as it has to say something.
Spoiler for Hint 1: (Highlight or hover over the text to view)
For example, this tag would have read 'Hint 1'
On a completely related topic, is there a significant reason that spoilers here on rpol do not collapse the hidden text? Is this just javascript shenanigans, or has no one mentioned it before? On other sites, people often use spoiler tags to collapse huge posts down to a table of contents of sorts.