| An occasional catalyst for regime change during the colonial era was the mass strike. |
| A catalyst for this reevaluation was horrifying devastation caused by use of the atomic bomb in Japan. |
| A modest investment could be a catalyst for the rejuvenation of an historic industrial area. |
| This conflict is a catalyst, leading to the re-examination of the relationships between these six people. |
| The case may turn out to be one of those terrible incidents that provide a wake-up call and a catalyst for positive change. |
| His almost unnoticed donkey work was the catalyst for a superb performance. |
