Synonyms of well-founded
3 similar words · 6 opposite words
Another word for well-founded is well-grounded. Other synonyms of well-founded are on solid ground and legitimate. The opposite of well-founded is ill-founded.
Synonyms and similar words for well-founded
adjectiveBased on reasoning, evidence and good judgement.
- well-groundedOf an argument, etc.: based on good judgment and solid reasoning.
- on solid groundConfident or justified regarding a subject or argument.
- legitimate
Opposite of well-founded
adjectiveBased on reasoning, evidence and good judgement.
- ill-foundedUnsubstantiated, not based on fact or evidence.
- ill-groundedOf an argument, position, etc.: based on poor judgment and weak reasoning or evidence.
- groundless
- baseless
- flimsyOf an argument, explanation, etc.: ill-founded, unconvincing, weak; also, unimportant; paltry, trivial.
- unjustified
Meaning of well-founded
- adjective Based on reasoning, evidence and good judgement.
- adjective Properly substantiated.
- adjective Of a binary relation: such that every non-empty subset of the relation's domain has a minimal element with respect to the relation.
well-founded in other languages
Questions about synonyms of well-founded
- What is another word for well-founded?
- Well-founded has 3 synonyms on Word.ws, such as well-grounded, on solid ground and legitimate.
- What is the opposite of well-founded?
- The opposite of well-founded is ill-founded. Other antonyms of well-founded are ill-grounded.
- What does well-founded mean?
- Well-founded means based on reasoning, evidence and good judgement.
Source and license
Adapted from Wiktionary: well-founded (page history and authors) and the entries of the words listed. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws grouped the synonyms and antonyms by meaning and added links. Wiktionary data of 2026-09-02.
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Cite this page: “Synonyms of well-founded.” Word.ws, https://word.ws/synonyms/well-founded. Based on Wiktionary, CC BY-SA 4.0.