I don't really think we are. A corpse is also just dead tissue after all. I don't think there's a significant difference in semantics here.

At the end of the day I don't think we should be debating the meaning of the words, just what we think they represent.

The main difference (to me) is when it's a separate living being. I would definitely call a just-conceived foetus "alive", but it's not an individual yet, and I would have no issue with aborting it.

Also I do want to make clear I'm very pro-abortion. I'm just autistic and get triggered by "misinformation" (this isn't misinformation but again my autistic ass can't think of the proper term).