The word "chasmic" means deep or gaping, something that is vast and almost infinite. Some common synonyms that can be used in place of "chasmic" are deep, profound, bottomless, fathomless, infinite, immeasurable, and boundless. These words all describe something that extends far beyond what can be easily seen or measured. Other synonyms for "chasmic" include cavernous, abyssal, and gaping - all of which describe something that is large, deep, and seemingly endless. Whether speaking of emotions, physical spaces, or existential concepts, these words accurately convey the sense of depth and vastness that "chasmic" implies.