Synonyms of jejune

1 Syllable
bland, flat, dull
2 Syllables
childish, trifling, inapt, banal, slushy, gushy, sobby, ho-hum, empty, schmaltzy, lamber, trite, ungrown, hohum, washier, painless, kidstuff, naive, soupy, barren, arid, prosy, meager, prosier, vapid, callow, gushier, triter, washy, tritest, beardless, milk-fed, sapless
3 Syllables
insipid, jellybean, pubescent, unhandy, savorless, tear-jerking, innocuous, inanest, unjaded, stuporous, pedestrian, inane, sterile, puerile, forbearant, inadept, unweaned
4 Syllables
unexciting, stereotypic, warmed-over, rosewater, overused, sentimental, milk-and-water, juvenile, mild-mannered, babylike, immature, readymade, ill-adapted, unproficient, unenjoyable, wishy-washy, sophomore, characterless
5 Syllables
institutional, stereotypical, platitudinal, platitudinous, uninteresting, unentertaining