Synonyms for Unflappable:

• adj.

  •calm (adjective)
  • unexcitable,
  • level-headed,
  • unexcited.
  •collected (adjective)
  • deliberate,
  • peaceful,
  • self-possessed.
  •composed (adjective)
  • at ease,
  • Disimpassioned.
  •controlled (adjective)
  • disciplined,
  • under control.
  •cool and calm (adjective)
  • easy,
  • relaxed.
  •levelheaded (adjective)
  • levelheaded.
  •unexcitable (adjective)
  • passionless,
  • staid,
  • aloof,
  • deadpan,
  • meek,
  • cold-blooded,
  • stoic,
  • stolid,
  • mild,
  • moderate,
  • self-composed,
  • easygoing,
  • inscrutable,
  • even-tempered,
  • frigid,
  • numb,
  • reserved,
  • steady,
  • demure,
  • unhurried,
  • placid,
  • self-controlled,
  • detached,
  • neutral,
  • tranquil,
  • apathetic.

• n.

  •
  • rational,
  • sensible,
  • Clear-headed,
  • practical,
  • Grounded,
  • pragmatic,
  • realistic,
  • logical,
  • balanced,
  • mature.
  •
  • even.

• Other synonyms:

  •
  • Cool-headed.
  •
  • possessed,
  • unruffled.
  •Other relevant words:
  • solemn,
  • distant,
  • sound,
  • dull,
  • laid-back,
  • steely,
  • unperturbed,
  • happy-go-lucky,
  • reliable,
  • predictable,
  • unbending,
  • together,
  • temperate,
  • grave,
  • unnervous,
  • secure,
  • phlegmatic,
  • fixed,
  • philosophical,
  • peace of mind,
  • stable,
  • loyal,
  • dignified,
  • undisturbed,
  • staunch,
  • immovable,
  • insouciant,
  • casual,
  • well-balanced,
  • fast,
  • in control,
  • sophisticated,
  • serious,
  • resigned,
  • dead silence,
  • flinty,
  • settled,
  • inflexible,
  • true,
  • speechless,
  • sober,
  • substantial,
  • down-to-earth,
  • unyielding,
  • Unpassionate,
  • indifferent,
  • unshaken,
  • fiducial,
  • patient,
  • self-assured,
  • unconcerned,
  • nerveless,
  • firm,
  • Inirritable,
  • confident,
  • long-suffering,
  • sot,
  • unflinching,
  • poised,
  • quiet,
  • solid,
  • unenthusiastic,
  • Pococurante,
  • bovine,
  • refined,
  • steadfast,
  • self-contained,
  • civilized,
  • uninterested,
  • unswerving,
  • offhand.

Antonyms for Unflappable:

• adj.

  • cool and calm
    nervous, upset, disconcerted, worried.
  • Other antonyms:
    aflutter, panicky, dithery, anxious, troubled, uptight, tense, discomposed, perturbed, nervy, edgy, uneasy, jittery, shakable, hung up, Perturbable, shaky, het up, jumpy.

• Other antonyms:

  • n.
    flappable.