hydrogen sulphide;  hydrogen sulfide;  sulphuretted hydrogen;  sulfuretted hydrogen
 deuterium;  heavy hydrogen
 hydrogen economy;  hydrogen energy based society
 sodium bicarbonate (NaHCO3)
 potassium bitartrate;  potassium hydrogen tartrate;  cream of tartar
 nickel metal hydride (NiMH)
 phosphine;  phosphane;  diphosphine;  diphosphane;  solid hydrogen phosphides (a yellow powder)
 phosphine;  phosphane;  diphosphine;  diphosphane;  solid hydrogen phosphides (a yellow powder)
 hydrogen economy;  hydrogen energy based society
 gray hydrogen;  grey hydrogen