The phrase "a chasm between two people" suggests a deep divide, a gulf that seems insurmountable. There are many synonyms that can be used to describe this sense of separation. Terms like estrangement, alienation, division, and gulf all capture the feeling of distance and disconnection. Other options might include schism, discord, rift, or breach. These words all highlight the sense of a split or break, whether it be emotional, psychological, or physical. Regardless of the phrasing, the core idea remains the same: two people who should feel close are instead separated by a great distance that seems impossible to bridge.