Or you could think of it as hypen conservation

Having been around since at least the birth of printing, the hyphen is apparently enjoying a difficult time at the moment.

The sixth edition of the Shorter Oxford English Dictionary has knocked the hyphens out of 16,000 words, many of them two-word compound nouns. Fig-leaf is now fig leaf, pot-belly is now pot belly, pigeon-hole has finally achieved one word status as pigeonhole and leap-frog is feeling whole again as leapfrog.

(BBC News)

I wonder if a Save the Hyphen bumper sticker would work.