"Act see" refers to the ability to observe or witness something happening. However, there are numerous synonyms that can be used to describe this concept. One such synonym is "behold", which implies the act of perceiving or experiencing with one's eyes. Another alternative could be "discern", which refers to the ability to recognize or distinguish something clearly. The word "gaze" is another synonym for "act see", emphasizing steady and prolonged observation. Additionally, "witness" can be used to convey the idea of actively seeing an event or situation taking place. Ultimately, these synonyms enable individuals to express the act of seeing in diverse and nuanced ways.