system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:  The difference between nuclear bombs.  Nuclear, Thermonuclear, Hydrogen...
gpt
A nuclear bomb uses the principle of fission.  Basically, it splits atoms, which creates a large amount of energy.  A nuclear bomb is also known as an atomic bomb.

A thermonuclear bomb uses the principle of fusion.  Instead of splitting atoms, it smashed them together, which produces even more energy.  A hydrogen bomb and a thermonuclear bomb are the same thing.