Synonyms for Stiff upper lip:

• adj.

  •imperturbable (adjective)
  • nerveless,
  • self-satisfied,
  • nonchalant,
  • untouched,
  • assured,
  • unflappable,
  • unruffled,
  • thick-skinned,
  • cool,
  • sedate,
  • unaffected,
  • self-possessed,
  • smug,
  • undisturbed,
  • complacent,
  • tranquil,
  • unmoved,
  • composed.
  •Other relevant words: (adjective)
  • roll with punches,
  • Disimpassioned,
  • unexcitable,
  • cool as cucumber,
  • equanimous,
  • immovable,
  • imperturbable,
  • stoical,
  • hard as nails.

• n.

  •attribute (noun)
  • stiff upper lip.
  •determination (noun)
  • courage,
  • dedication,
  • grit,
  • certitude,
  • drive,
  • doggedness,
  • purpose,
  • obstinacy,
  • independence,
  • self-confidence,
  • resolution,
  • steadfastness,
  • fortitude,
  • spine,
  • heart,
  • valor,
  • assurance,
  • boldness,
  • nerve,
  • spunk,
  • purposefulness,
  • hardihood,
  • conviction,
  • certainty,
  • energy,
  • constancy,
  • backbone,
  • decision,
  • bravery,
  • resolve,
  • dauntlessness,
  • stubbornness,
  • guts,
  • resoluteness,
  • tenacity,
  • intrepidity.
  •Other relevant words: (noun)
  • indomitability,
  • persistence,
  • singlemindedness,
  • firm-ness,
  • pluck,
  • temperateness,
  • single-mindedness,
  • fearlessness,
  • self-restraint,
  • dogmatism.

• Other synonyms:

  •
  • self-control,
  • willpower,
  • self-discipline,
  • self-censorship,
  • temperance.
  •
  • constraint,
  • dignity.
  •
  • discipline.
  •
  • get together.
  •Other relevant words:
  • stone-faced,
  • sphinx-like,
  • stony-faced.
  •Other relevant words (noun):
  • determination.

Antonyms for Stiff upper lip:

• adj.

  • imperturbable
    excitable, touchy, irritable, Perturbable, jittery.

• n.

  • determination
    doubt, timidity, hesitation, diffidence, cowardice, idleness, wavering, fear, indecision, start, weakness, indifference, spinelessness, beginning, irresolution, vacillation, disinterest.

Hyponym for Stiff upper lip:

• n.

  • attribute
    self-restraint, temperateness.