Synonyms:
- groundless,
- inconclusive,
- indecisive,
- not following,
- not proved,
- unascertained,
- unattested,
- unauthenticated,
- uncertified,
- unconfirmed,
- uncorroborated,
- undemonstrated,
- undetermined,
- unestablished,
- unfixed,
- unfounded,
- unproved,
- unproven,
- unsettled,
- unshown,
- unsupported,
- unsupported by evidence,
- unsustained,
- untested,
- untried,
- unvalidated,
- unverified,
- without basis,
- without grounds