Quantic, in its simplest understanding, refers to the realm of quantum mechanics. However, there are numerous synonyms you can use instead of quantic. One of them is "quantum," which relates to the physical dimension of physics or quantum mechanics. Additionally, you can use "subatomic" or "atomic" as synonyms for quantic when referring to matter at the quantum level. "Non-classical" is another word that can be used to describe the behavior of matter at the quantum level. "Wave-particle duality" is another phrase synonymous with quantic as this refers to the behavior of matter on the atomic and subatomic level. Therefore, depending on context and usage, there are several words or phrases that can serve as synonyms for quantic.