H-bomb vs hydrogen bomb

H-bomb and hydrogen bomb both are nouns.

Word	Noun	Adjective	Verb	Adverb
H-bomb	Yes	No	No	No
hydrogen bomb	Yes	No	No	No

As nouns, H-bomb and hydrogen bomb are synonyms defined as:

H-bomb and hydrogen bomb: a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium

Other synonyms of H-bomb include fusion bomb, thermonuclear bomb.

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