All undoubtable synonyms
doubt
U u adj undoubtable
- certain — If you are certain about something, you firmly believe it is true and have no doubt about it. If you are not certain about something, you do not have definite knowledge about it.
- deductible — If a payment or expense is deductible, it can be deducted from another sum such as your income, for example, when calculating how much income tax you have to pay.
adjective undoubtable
- confirmable — Capable of being checked, verifiable.
- establishable — Able to be established.