"Vaporousnesses" is a relatively uncommon word that refers to the quality of being vaporous or having the characteristics of vapor. Some synonyms that could be used in place of this word include "evanescence," which refers to the quality of being fleeting or transient; "diaphanousness," which refers to the quality of being transparent or translucent; "etherealness," which refers to the light and airy quality of something; and "resilience," which refers to the ability to recover or bounce back from adversity. While each of these words has a slightly different connotation, they all capture some aspect of the idea of "vaporousnesses".