Giving momentum refers to the act of providing something with the force, energy, or impetus needed to move forward. There are several other words that can be used as synonyms for this phrase. These include propel, drive, thrust, push, boost, and spur. Each of these words can be used interchangeably with give momentum to describe the action of providing movement or energy to someone or something. Using these synonyms can help to add depth and variety to written or spoken language and make it more engaging and compelling.