nuclear fusion increases the mass through fusing two nuclei together into one
nuclear_fusion is nuclear_process. nuclear_fusion is transformation_process. biological_fusion is fusing. fusion_weapon is nuclear_weapon. merging_of_cell_nuclei is biological_fusion. fusion_bomb is atomic_weapon. fusion_bomb is weapon_of_mass_destruction. fusion_bomb is nuclear_weapon. fusion is nuclear_reaction. fusion_rocket is nuclear_rocket.