Hydrogen bomb and Weapon of mass destruction

Hydrogen bomb noun - A nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium.

Weapon of mass destruction and hydrogen bomb are semantically related In some cases you can use "Weapon of mass destruction" instead a noun phrase "Hydrogen bomb".

Weapon of mass destruction noun - A weapon that kills or injures civilian as well as military personnel (nuclear and chemical and biological weapons).

Hydrogen bomb and weapon of mass destruction are semantically related in atomic weapon topic. You can use "Hydrogen bomb" instead a noun phrase "Weapon of mass destruction".