Quantum state, in physics, refers to the state of a quantum mechanical system at a specific time. There are a variety of synonyms for the term quantum state, one of which is wave function. The wave function of a system is a mathematical function used to describe probabilities of quantum states. Another synonym for quantum state is superposition, referring to a quantum system being in multiple states at once. Entanglement is another synonym, describing the correlation between two or more quantum states. Lastly, decoherence is a term used to describe the loss of coherence between different quantum states in a system. Overall, these synonyms demonstrate the complexity and unique nature of quantum mechanics and its study of quantum states.