Synonyms for Tedious:

adj.

boring (adjective)
depressing, prosaic, wearisome, mundane, monotonous, uninteresting, tiresome, boring, insipid, humdrum, dry, commonplace, dull, Weariful, dreary.
dull, monotonous (adjective)
dreary, prosaic, ho-hum, tiresome, humdrum, insipid, Irksome, dry, uninteresting, unexciting, slow, wearisome, Weariful, boring.
talkative (adjective)
wordy.
unimaginative (adjective)
prosaic.
wordy (adjective)
prolix.

n.

trivial, uninspired, unexciting. Weariful, excite, stuffy, weary, drear. tedious (noun)
deadening, slow, ho-hum, uninteresting, long-winded, prolix, wordy, dull, wearisome, verbose, tiresome, windy, Irksome, boring.

Other synonyms:

Weariful, trivial, unexciting, uninspired, drear. weary, stuffy. irksome
Irksome.
Other relevant words:
ho-hum, Weariful, prolix, slow, stuffy, trivial, drear, Irksome, windy, wordy, weary, long-winded, uninspired, verbose, unexciting, deadening.

Usage examples for tedious

  1. This, of course, required me to go through the tedious and painful process of making a cross- section with my knife- a kind of work that absorbed more of my time, and caused me more labour, than all the rest put together. – The Boy Tar by Mayne Reid
  2. Why this everlasting, tedious march, when there are so many excellent band pieces on the market that would fit the occasion better? – Memoirs of an American Prima Donna by Clara Louise Kellogg
  3. It must be tedious waiting. – Penny Nichols Finds a Clue by Joan Clark