A Vizard is a Shinigami that has gained Hollow powers. Aizen forced this upon several members of the Soul Society. However, Ichigo acquired it naturally in a forced method to become a Shinigami.
An Arrancar is a Hollow that removes it's mask to gain powers similiar to Shinigami.
The major difference is that Arrancar ALWAYS have their abilities activated, but a Vizard has to put on his mask and it can be shattered by his opponent to end the transformation.
Ichigo is a Vizard, not an Arrancar.
Why are you arguing with me? You obviously don't read the manga or if you do your interpreting skills are lacking or you're just making ish up.
Tousen is a shinigami, right? He (and Aizen) never called himself a Vizard. He called them Arrancar wannabes. Proof:
Also since we are in agreement that Tousen is a shinigami. When he released, he called it a Resurrection. Proof: