The phrase "airy nothing" evokes a sense of emptiness and frivolity. Synonyms for this phrase may include "ethereal nothingness," "unsubstantial emptiness," or "fanciful nothing." Other words that may capture the same sense include "flimsy," "insubstantial," or "lacking substance." "Fleeting" or "ephemeral" might also be appropriate descriptors of something that seems insubstantial or without weight. When looking for synonyms, think about words that convey a sense of the intangible or insubstantial, such as "dreamlike," "airy," or "immaterial." By exploring different synonyms, you can more fully appreciate the complexity of this common and evocative phrase.