The tag alias #78897 nailpolish -> colored_nails has been rejected.
Reason: Same meaning. The two-word version (nail_polish) is already aliased to colored_nails, so I think the one-word version (nailpolish) should be aliased to it as well, even though it's not a proper spelling version.
Improper spelling version: nailpolish
Proper spelling version: nail polish
EDIT: The tag alias nailpolish -> colored_nails (forum #462551) has been rejected by @cabo27judy.
Updated