fusion bomb vs hydrogen bomb

fusion bomb and hydrogen bomb both are nouns.

Word	Noun	Adjective	Verb	Adverb
fusion bomb	Yes	No	No	No
hydrogen bomb	Yes	No	No	No

As nouns, fusion bomb and hydrogen bomb are synonyms defined as:

fusion 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 fusion bomb include H-bomb, thermonuclear bomb.

fusion 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