H-bomb and Hydrogen-bomb

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

Hydrogen-bomb and H-bomb are semantically related In some cases you can replace phrase "Hydrogen-bomb" with "H-bomb", this phrases are similar.

Hydrogen-bomb verb - Attack with a hydrogen bomb.

H-bomb and hydrogen-bomb are semantically related in nuclear bomb topic. You can use "H-bomb" instead a noun phrase "Hydrogen-bomb".