Synonyms for Insipid:

adj.

all (adjective)
jejune.
arid (adjective)
dreary, dull, boring.
bland (adjective)
uninteresting, humdrum, monotonous, Waterish.
boring (adjective)
dreary, commonplace, dull, prosaic, uninteresting, mundane, monotonous, tedious, boring, tiresome, dry, depressing, wearisome, humdrum.
dead (adjective)
tasteless.
irresolute (adjective)
impulsive, double-minded, halfhearted, shy, changeable, fickle, undependable, irresolute, vacillating, watery, Shilly-shally, indecisive, spineless, unwilling, infirm, ambivalent, unresolved, irresponsible, shifty, weak, hesitant, fly-by-night, tentative, volatile, dillydallying, capricious, erratic, inconsistent, uncertain, Flitting, undecided, unsure, yellow, shrinking.
mild (adjective)
cordial, lenient, benign, tolerant, soft, liberal, benevolent, clement, broad-minded, mild, forbearing, meek, kind, peaceable, amiable, permissive, gentle, libertarian, moderate, sweet, peaceful, even, tender, quiet, open-minded, charitable, genial, lax.
tasteless (adjective)
flavorless, bland, milquetoast, tasteless, mild, stale, savorless, unsavory, banal, vapid, jejune, flat, weak, plain.
unimportant (adjective)
insignificant, one-horse, frivolous, unimportant, fiddling, trifling, banal, irrelevant, measly, minute, worthless, Flyspeck, trite, piddling, trivial, inconsequential.
watery (adjective)
wishy-washy.
weak (adjective)
washy.
wishy-washy (adjective)
wishy-washy.

n.

dusky, subdued, muted, dim, leaden, taste, wan. Waterish, washy, namby-pamby, wishy-washy, excite, good. uninteresting (noun)
lifeless.

Other synonyms:

inedible, rancid. washy, nasty, namby-pamby, sour, dusky, muted. wan, Waterish, subdued. bad, leaden. dim.

Usage examples for insipid

  1. Even single- stick and wrestling appeared insipid succeeding to that strife, that had well- nigh proved deadly. – The White Gauntlet by Mayne Reid
  2. Killigrew lay opposite Doughty now, looking oddly girlish with his slim form and colourless face, that would have been insipid but for his too red mouth. – Secret Bread by F. Tennyson Jesse
  3. He gave me, however, under cross- examination, interesting hints about rural matters, and I liked him, although I felt his company to be insipid – Father and Son by Edmund Gosse