What is another word for "vapor"?

Roget's Thesaurus (1911) lists these synonyms for "vapor": aeration, aerial, aerification, aeriform, aerodynamics, aerostatics, air, airy, alembic, alkali, ammonia, ammoniacal, andiron, area, athanor, backlog, bakehouse, bath, bay, bladder, boil, boiler, boiling, brasier, bubble, bubbly, burner, caboose, caldron, camboose, central, chamber, chloride, cloud, coal, cohobate, cohobation, combustion, conservatory, convective.