remora /remˈə-rə/

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

• trough shells
• troule
• trou-madame
• trounce
• trounced
• trouncer
• trouncers
• trounces
• trouncing
• trouncings
• troupe
• trouped
• trouper
• troupers
• troupes
• troupial
• troupials
• trouping
• trous-de-loup
• trouse
• trouser
• trousered
• trousering
• trouserings
• trousers