1. Unsupported by other evidence
   - unsubstantiated

See also: unsupported

• impasto
• impatience
• impatiens
• Impatiens capensis
• impatient
• impatiently
• impeach
• impeachability
• impeachable
• impeacher
• impeachment
• impeccability
• impeccable
• impeccably
• impeccant
• impecuniosity
• impecunious
• impecuniousness
• impedance
• impede
• impeded
• impediment
• impedimenta
• impeding
• impeditive