Immensurable is an adjective that describes something that cannot be measured, quantified, or described due to its great size, magnitude, or complexity. Some synonyms for immensurable include immeasurable, infinite, boundless, limitless, endless, vast, enormous, immense, incalculable, and enormous. Other synonyms that capture the idea of something too vast or complex to comprehend include unfathomable, incomprehensible, inscrutable, and inexplicable. These words all suggest something beyond our understanding, whether it is an abstract concept, physical object, or emotional state. Using synonyms for immensurable can help add variety and depth to your writing, especially in describing the awe-inspiring and overwhelming aspects of the world around us or the mysteries of the human experience.