Ideational agnosia is a condition where the individual cannot recognize or comprehend complex objects or concepts. This condition can be caused by brain damage, dementia, or other neurological disorders. There are several synonyms for ideational agnosia, including conceptual agnosia, semantic agnosia, and object agnosia. These terms all describe a condition where the patient experiences difficulty in recognizing and understanding different concepts, objects, and words. Another synonym for ideational agnosia could be perceptual agnosia, which refers to the inability to perceive and interpret sensory stimuli despite normal sensory function. Overall, ideational agnosia and its various synonyms describe a type of cognition impairment that affects higher-level thinking and understanding.