remora /remˈə-rə/

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

• square foot
• squarehead
• squareheads
• square inch
• square inches
• square knot
• square knots
• square leg
• square legs
• square-lipped rhinoceros
• squarely
• square matrices
• square matrix
• square matrixes
• square meal
• square meals
• square measure
• square measures
• square metre
• square mile
• square miles
• squareness
• squarenesses
• square number
• square numbers