Anthropomorphism - Comment #686,521

It's quite different. Gijinka turns everything into a human anime char that has some details of the original thing. But very often you have to add subtitles or an image of the original thing to make it clear enough.
Look at this:

Without the subtitles they are just normal anime girl.
Anthropomorfism is adding some humanoid detals to a thing, making it look sentient but stil perfectly recognizable as the original thing:

Well, Gijinka is basically a (Fairly extreme) form of anthropomorphism, though you're definitely right in that they should both stay, given that one's just one form of it and the other's an umbrella for all of 'em.

Also, nitpicky but you meant sapient, not sentient. Don't worry, common mistake.

I always heard "sentient" infact.

Yeah, it's a common mixup.

Damn!