| Clue | Length | Answer |
|---|---|---|
| unproven | 7 letters | untried |
| unproven | 7 letters | unfixed |
| unproven | 8 letters | unproved |
| unproven | 8 letters | untested |
| unproven | 9 letters | unsettled |
| unproven | 9 letters | unfounded |
| unproven | 10 letters | unverified |
| unproven | 11 letters | unconfirmed |
| unproven | 11 letters | speculative |
| unproven | 11 letters | uncertified |
| unproven | 11 letters | unsupported |
| unproven | 11 letters | unsustained |
| unproven | 11 letters | theoretical |
| unproven | 12 letters | undetermined |
| unproven | 13 letters | unestablished |
| unproven | 14 letters | uncorroborated |
| unproven | 14 letters | undemonstrated |
| unproven | 15 letters | unsubstantiated |
| unproven | 15 letters | unauthenticated |
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