Englishtedium
noun
to relieve the tedium of the days, they sang or told stories:
monotony, monotonousness, tediousness, dullness, boredom, ennui, uneventfulness, lack of variety, lack of variation, lack of interest, lack of excitement, sameness, unchangingness, uniformity, routineness, humdrumness, dreariness, mundaneness, wearisomeness, tiresomeness, dryness, aridity, lifelessness, colourlessness, featurelessness, slowness, banality, vapidity, insipidity, blandness, prosaicness, jejuneness;
long-windedness, prolixity, laboriousness, ponderousness, endlessness, interminableness;
informal deadliness;
British, informal sameyness.
▷antonyms variety, excitement.
tedium Oxford Dictionary of English