Synonyms and related words :
brief, brittle, capricious, changeable, corruptible, deciduous, dying, episodic, evanescent, evergreen, fading, fickle, fleeting, flitting, fly-by-night, flying, fragile, frail, fugacious, fugitive, half-hardy, hardy, impermanent, impetuous, impulsive, inconstant, insubstantial, momentary, mortal, mutable, nondurable, nonpermanent, passing, perennial, perishable, short, short-lived, subject to death, temporal, temporary, transient, transitive, transitory, undurable, unenduring, unstable, volatile