What is another word for "nitrogen"?

Roget's Thesaurus (1911) lists these synonyms for "nitrogen": agent, anaesthesia, anaesthetic, anaesthetize, benumb, blunt, callous, case, chloral, chloroform, cold, coma, comatose, cooler, damper, dead, deep, dry, dull, ether, exhilarating, freeze, freezer, freezing, frigidarium, gas, hard, hardened, have, helium, hemiplegia, hide, ice, impercipient, influence, insensibility, insensible, laboratory, laughing, liquid.