Find Antonyms

groundless Antonyms

Opposite of groundless

Pinning down the opposite of groundless requires matching its exact sense, so the antonyms and opposite words below are paired with a clear adjective definition and ranked by contrast strength.
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• adjective (Context 1)

Not based on any good reason, valid evidence, or factual foundation (typically of a fear, rumor, or accusation).

Usage Example

"The committee quickly dismissed the allegations as completely well-founded after reviewing the financial records."

Strongest
well-founded
justified
warranted
substantiated
Strong
valid
legitimate
reasonable

Similar words to groundless

Words similar to groundless shift depending on context. Common synonyms include:

baseless
unfounded
unjustified
unwarranted
unsubstantiated
unsupported
idle
See all synonyms of groundless

• Nearby Words

groundedness
grounder
grounding
groundless
groundlessly
groundstroke
groundswell

Cite this Entry

Wordmom. (2026). Antonyms for Groundless. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/groundless
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