Synonyms for Till cows come home:

• adj.

  •lasting (adjective)
  • durable,
  • everlasting,
  • inexpungible,
  • long-term,
  • continual,
  • eternal,
  • old,
  • indissoluble,
  • permanent,
  • abiding,
  • in for the long haul,
  • longstanding,
  • deep-rooted,
  • constant,
  • inexhaustible,
  • perdurable,
  • perpetual,
  • unceasing,
  • endless,
  • persisting,
  • lifelong,
  • perennial,
  • continuing,
  • undying,
  • incessant,
  • stable,
  • indelible,
  • unremitting.

• adv.

  •always (adverb)
  • ever,
  • regularly,
  • consistently,
  • invariably,
  • constantly,
  • till hell freezes over,
  • for keeps,
  • repeatedly,
  • evermore,
  • perpetually.
  •eternally (adverb)
  • continually.
  •ever (adverb)
  • in any case,
  • relentlessly,
  • anytime,
  • by any chance,
  • to the end of time,
  • on any occasion,
  • at all times,
  • usually,
  • incessantly,
  • at any point,
  • at all,
  • endlessly,
  • unendingly.
  •forever (adverb)
  • lastingly,
  • enduringly,
  • for life,
  • Unchangingly,
  • for always,
  • world without end,
  • in perpetuity,
  • on and on,
  • now and forever,
  • interminably,
  • Immortally,
  • till doomsday,
  • till the end of time,
  • infinitely,
  • permanently,
  • till the cows come home,
  • Durably,
  • till death do us part,
  • for good,
  • everything considered.

• Other synonyms:

  •adv
  • always,
  • eternally,
  • everlastingly,
  • forevermore,
  • unceasingly,
  • without exception,
  • for ever so long,
  • in perpetuum,
  • till blue in the face.
  •adv.
  • forever.

Antonyms for Till cows come home:

• adj.

  • lasting
    passing, impermanent, short-lived, transient, fleeting, ephemeral.

• adv.

  • always
    never, at no time.
  • eternally
    temporarily, briefly, Changeably, transiently.
  • forever
    ending, brief, Ceasing, temporary.