Impulsor, a term widely used in various contexts, has several synonyms that can be employed to provide more clarity and variety in communication. An equivalent phrase for impulsor could be "catalyst", which refers to someone or something that stimulates or precipitates change. Another synonym worth mentioning is "instigator", denoting someone who initiates or provokes action. Additionally, the term "propeller" serves as a synonym for impulsor, emphasizing an entity's role in propelling or driving forward. Finally, "motivator" can also be used to convey the sense of a driving force or incentive that spurs action or change. These synonyms facilitate a nuanced depiction of an impulsor's impact and significance in different contexts.