Comparing the power of "bolster" and "strengthen"

What is similar?

Both "bolster" and "strengthen" refer to the act of making something more robust or supporting it to become more effective or stronger. They can both be used in contexts where support, reinforcement, or enhancement is implied.

What is different?

The word "bolster" typically implies providing additional support or reinforcement to something, often with the connotation of providing support from underneath or shoring up. It can be both literal and metaphorical. "Strengthen" is more general and refers to the process of making something stronger or more resilient without necessarily implying the means or method of doing so. It is often used more broadly without the implication of providing support from below or from within.

Which one is more common?