User blog comment:Liquoritz/Categories Needs Renaming Because Of Capitalisation etc.!/@comment-23204006-20131102000709/@comment-3225604-20131102030457

I think both are acceptable, because none of the words here are verbs. Take an example, we say "closed-door" instead of "close-door" because a verb is included. We don't say "close-doored". However, layered is not a typo, thus both are acceptable.