Aliasing Anthropomorphism -> Personification.

Reason: At forum #75443, we have decided 6 months ago what both of these words should refer to. From what I can see, we have not decided to separate the tags. The definitions of the words overlap so much that they are visually indistinguishable to anyone who doesn't have a Ph.D in English. Also, we currently have posts tagged with personification but none tagged with anthropomorphism.

I'll go ahead with this, given that anthropomorphism isn't in use, so nothing is lost.