Definition for Groundless:

• Without foundation; without reason; as, groundless fears.

Synonyms for Groundless:

• adj.

  •baseless (adjective)
  • uncorroborated,
  • ungrounded,
  • Foundationless,
  • unsupported,
  • unconfirmed.
  •nonexistent (adjective)
  • hypothetical.
  •unfounded (adjective)
  • unproven.
  •unwarranted (adjective)
  • unwarrantable,
  • unjustifiable.
  •without reason, justification (adjective)
  • empty,
  • imaginary,
  • chimerical,
  • unauthorized,
  • false,
  • illusory,
  • unjustified,
  • uncalled-for.

• n.

  •
  • allegedly,
  • doubtful,
  • alleged,
  • seemingly,
  • anecdotal,
  • apparently,
  • supposed,
  • speculative.
  •causeless (noun)
  • illogical.
  •groundless (noun)
  • unwarranted.

• Other synonyms:

  •
  • bottomless.
  •unproven
  • unverified.
  •unwanted
  • needless.

Paraphrases for Groundless:

• Equivalence

  • Adjective
    unfounded, baseless, unsubstantiated, ill-founded, unjustified, unwarranted, ungrounded, unsupported.

• Independent

  • Adjective
    untrue, well-founded, substantiated, false, indefensible, invalid, unsound, flimsy, unnecessary, flawed, incorrect, justified, inaccurate, undue, irrational, pointless, unjust.
  • Noun, singular or mass
    merit.
  • Verb, past participle
    Grounded, Underpinned, founded, sustained, reinforced, misplaced, built, based, substantiated, flawed, justified.

• Other Related

  • Adjective
    unjustifiable, unreasonable, untenable, gratuitous, unprovoked, frivolous.

Antonyms for Groundless:

• adj.

  • without reason, justification
    justified, right, correct, warranted, proven, reasonable, called-for, Grounded.
  • Other antonyms:
    confirmed, wise, validated, true, genuine, substantiated, verified, sound, actual, sure, informed, sensible, sane, certified, well-grounded, certain, hard, credible, corroborated, plausible, real, clear.