The Vocalibrate dictionary

ephemeral

/ɪˈfɛmərəl/adjective

lasting only a very short time

Fame on social media is often ephemeral.

Near in meaning
fleetingtransientshort-livedmomentary
In the family
ephemerallyephemeralityephemera

More words worth knowing

prurienttoo interested in sex, especially other people'ssonorousdeep, full, and rich in soundignobledishonorable and shamefulmercurialunpredictable, with sudden changes of moodextantstill in existence; not destroyed or lostepistolaryin the form of letters, or carried on by letter