To support or prop up something can be described as?

The term "bolster" is used to describe the action of supporting or proppping up something physically or metaphorically. In various contexts, it means to provide encouragement, support, or aid in strengthening an argument, a position, or even a physical structure. For example, one might bolster an argument by providing additional evidence or bolster a team's performance by supporting its members.

In contrast, "enhance" typically refers to improving the quality or value of something rather than providing support. "Substantiate" means to provide proof or evidence to confirm something, focusing on validation rather than support. "Back" can imply support in a more casual sense, but it does not encapsulate the specific meaning of prop up as effectively as "bolster," which carries a more direct connotation of robust support.