remora /remˈə-rə/

1. The sucking-fish, formerly believed to stop ships by attaching its sucker
2. An obstacle (figurative)

• UNCTAD
• unction
• unctions
• unctuosities
• unctuosity
• unctuous
• unctuously
• unctuousness
• unctuousnesses
• uncuckolded
• unculled
• uncultivable
• uncultivatable
• uncultivated
• uncultured
• uncumbered
• uncurable
• uncurbable
• uncurbed
• uncurdled
• uncured
• uncurious
• uncurl
• uncurled
• uncurling