Incognizance is a word used to describe someone who is unaware or unknowing, but there are many other synonyms that can be used in its place. For example, the term "ignorance" can be used to describe someone who is unaware or uninformed about a particular subject. "Unconsciousness" or "unawareness" can be used to describe someone who is not fully aware or attentive to their surroundings. "Inattention" or "neglect" can be used to describe someone who is not paying close attention to what is happening around them. Overall, there are many words that can be used to describe someone who is not fully cognizant or aware of their surroundings or situation.