Definition for No-nonsense:

• not tolerating irrelevancies; " the no- nonsense tones of a stern parent"

Synonyms for No-nonsense:

• adj.

  •intolerant (adjective)
  • direct,
  • rigid,
  • practical,
  • hard,
  • demanding,
  • efficient,
  • stern.

• n.

  •
  • in earnest.

• Other synonyms:

  •
  • sobersided.
  •
  • businesslike.
  •Other relevant words:
  • plain,
  • hard-nosed,
  • sensible,
  • sombre,
  • level-headed,
  • unromantic,
  • uncomic,
  • somber,
  • pragmatic,
  • realistic,
  • hard-boiled,
  • rational,
  • tough-minded,
  • frank,
  • humorless,
  • outright,
  • sane,
  • candid,
  • Hard-headed,
  • straight,
  • common sense,
  • straightforward,
  • point-blank,
  • non-trivial,
  • tough,
  • untrivial,
  • unsmiling,
  • unfrivolous,
  • Business-like,
  • reasonable,
  • severe.

Antonyms for No-nonsense:

• adj.

  • Other antonyms:
    flighty, droll, goofy, mad, dotty, puerile, screaming, absurd, light, wacky, witless, balmy, harebrained, light-headed, unwise, fatuous, foolish, jerky, comic, playful, uproarious, preposterous, humorous, brainless, funny, hilarious, risible, insane, frivolous, crazy, jesting, asinine, cuckoo, screwball, kooky, joking, farcical, comical, senseless, loony, hysterical, cockeyed, scatterbrained, sappy, laughable, featherbrained, daft, riotous, ludicrous, lunatic, zany, ridiculous, half-witted, nonsensical, antic, facetious, Daffy, kittenish, silly, lighthearted, flippant, nutty, sidesplitting, Weak-minded, indirect, jocular, flip.