remora /remˈə-rə/

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

• Mills-and-Boon
• Mills bomb
• millscale
• millscales
• mill-sixpence
• mill-sixpences
• millstone
• millstone grit
• millstones
• millstream
• millstreams
• milltail
• milltails
• mill-teeth
• mill-tooth
• millwheel
• millwheels
• millwork
• millworker
• millworkers
• millworks
• millwright
• millwrights
• MILNET
• milo