All based antonyms
base
B b adjective based
- reasonless — not having any reason or sense: an utterly reasonless display of anger.
- unsupported — to bear or hold up (a load, mass, structure, part, etc.); serve as a foundation for.
- unconfirmed — to establish the truth, accuracy, validity, or genuineness of; corroborate; verify: This report confirms my suspicions.
- baseless — If you describe an accusation, rumour, or report as baseless, you mean that it is not true and is not based on facts.
- uncorroborated — to make more certain; confirm: He corroborated my account of the accident.