A-bomb and Weapon of mass destruction

A-bomb noun - A nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element like uranium 235 or plutonium 239).

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

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

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