Is it cover all usage of this word in program naming? Because there it usage seems based on association with a thing naming https://en.wikipedia.org/wiki/Blender
The issue isn't the subtle details of the law. The issue is there is zero chance you'll show up in search rankings because of the strength of the blender association and there is a similarly almost 100% chance name confusion will hurt awareness of your product, for all the same reasons.
Blender is a great name, it's unfortunately already taken, and you're just hurting your project by pretending that's not the case, as the comments here indicate.