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groundless Synonyms
Another word for groundless
Choosing another word for groundless that fits your sentence is easier when synonyms and similar words are paired with an exact adjective definition and ranked by match strength.
• 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 baseless after reviewing the financial records."
Strongest
baseless
unfounded
unjustified
unwarranted
Strong
unsubstantiated
unsupported
idle
Opposites of groundless
The opposite of groundless shifts depending on context. Common opposites include:
well-founded
justified
warranted
substantiated
valid
legitimate
reasonable
• Nearby Words
Cite this Entry
Wordmom. (2026). Synonyms for Groundless. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/groundless