Definition for Gratuitous:

• Gratuitousness.

Synonyms for Gratuitous:

• adj.

  •baseless (adjective)
  • ungrounded,
  • unsupported,
  • reasonless.
  •for free (adjective)
  • on the house.
  •free (adjective)
  • willing,
  • for nothing,
  • free of cost,
  • unpaid,
  • for love.
  •generous (adjective)
  • eleemosynary.
  •groundless (adjective)
  • causeless,
  • unprovoked.
  •honorary (adjective)
  • titular,
  • nominal,
  • commemorative,
  • honorary.
  •inordinate (adjective)
  • untempered,
  • overindulgent.
  •needless (adjective)
  • Non-essential.
  •not necessary (adjective)
  • indefensible,
  • unsupportable,
  • inessential,
  • unessential,
  • assumed,
  • bottomless,
  • supererogatory.
  •superfluous (adjective)
  • excessive,
  • exorbitant,
  • surplus,
  • superabundant,
  • extravagant,
  • overabundant,
  • redundant,
  • copious,
  • immoderate,
  • outrageous,
  • overflowing.

• n.

  •
  • complacency,
  • complacent,
  • casual,
  • careless,
  • perfunctory,
  • slipshod,
  • lackadaisical,
  • remiss.
  •
  • money.
  •gratuitous (noun)
  • unmerited,
  • unneeded.

Antonyms for Gratuitous:

• adj.

  • free
    costly, reasonable, needed, warranted, expensive, deserved.
  • not necessary
    necessary, proven, called-for, justified, Grounded.
  • Other antonyms:
    merited, all-important, needful, essential, costly, indispensable, imperative, important, dear, expensive, required, needed, deserved, urgent, high, crucial, pressing, vital.

• Other antonyms:

  • n.
    onerous.