Reflex movement, also known as automatic movement, refers to an involuntary action that occurs in response to a stimulus. Although the term "reflex movement" is commonly used to describe this mechanism, there are various synonyms that represent the same concept. One such synonym is "instinctive response", which emphasizes the inherent nature of the reaction. Another alternative is "spontaneous reflex", highlighting the immediate and automatic nature of the movement. "Involuntary action" is another suitable synonym, emphasizing the lack of conscious control over the response. These synonyms collectively capture the essence of reflex movement, showcasing the automatic and involuntary nature of these inherent human actions.