The quality of being ephemeral or transitory.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "ephemeralness" in a sentence
"Reading the Parable of the Old Man and the Sock by Irving Karchmar, a dervish and novelist, made me reflect (once again) on the ephemeralness of life."
"It seldom does The chief reason was slimmeroftheyea wanted me to see the bluebell wood before we lost them for this year, and glorious they were; blue beneath the broken ash woodland cover and of a peculiar mass ephemeralness."
"Yet we spend so much of our time here in endless conflict with others that we lose sight of the ephemeralness of life."