Trigger off is a common phrase used to describe something that initiates or sets off a particular chain of events. However, there are many synonyms that can be used in place of this phrase. Some possible alternatives include "provoke," "initiate," "prompt," "catalyze," and "stimulate." Each of these words conveys a similar meaning to "trigger off" but may be better suited for specific contexts. For example, "provoke" and "catalyze" both convey a sense of inciting action, while "prompt" and "stimulate" focus more on causing a reaction. Regardless of the word chosen, each synonym for "trigger off" helps to describe the beginning of a process or event.