impermanency
Life is often shaped by impermanence and solitude.
The impermanence of wood is in contrast to the permanence of stone.
A sense of impermanence is contrary to the impulse to improve your environment.

SMART Vocabulary: related words and phrases

Temporary
be a nine days' wonderidiom
casual
casually
eddy
ephemeral
fugacious
fugitive
here
here today, gone tomorrowidiom
impermanency
placeholder
pro tem
provisional
provisionary
provisory
sticking plaster
transient
transiently
transitorily
transitory