unsubstantiated
adjective /ˌʌnsəbˈstænʃieɪtɪd/
/ˌʌnsəbˈstænʃieɪtɪd/
(formal)- not proved to be true by evidence synonym unsupported
- an unsubstantiated claim/rumour, etc.
- The court found that most of her claims were unsubstantiated.
- There were unsubstantiated rumours of abuse at the prison.
Oxford Collocations DictionaryUnsubstantiated is used with these nouns:- accusation
- allegation
- assertion
- …