What is another word for "essence"?

Roget's Thesaurus (1911) lists these synonyms for "essence": act, acute, aeration, aerial, aerification, aeriform, aerodynamics, aerostatics, agalloch, air, airy, alkali, ambrosial, ammonia, ammoniacal, animal, aroma, aromatic, attar, balm, balmy, bay, bergamot, bladder, bloodhound, bottle, bouquet, calambac, calambour, civet, cloud, diffuse, effluvium, elastic, emanation, embalm, emit, essential, ether, ethereal.