The bulk update request #12266 has been approved by @evazion.
create alias licking_knife -> licking_blade
Generalizing this small tag.
Edit: I just remembered we also have licking weapon, which licking blade implies but not licking knife. I'm not sure if there's a need to have such degree of precision for a tag this small. Yeah sure, a knife is not always a weapon, but it's three different tags for the exact same thing.