röntgenogram or roentgenogram/ʹruntyənohgram, ʹrən-/ noun

• unravel
• unread
• unreadable
• unready
• unreal
• unrealistic
• unreason
• unreasonable
• unreasoning
• unreconstructed
• unregenerate
• unrelenting
• unreliable
• unremitting
• unremunerative
• unrepeatable
• unrepresentative
• unrequited
• unreserved
• unresponsive
• unrest
• unrestrained
• unrewarding
• unripe
• unrivalled