coistrel or coistril /koisˈtril/

1. A groom (obsolete)
2. A knave (Shakespeare)

• troubleshooter
• troubleshooters
• troubleshooting
• troubleshoots
• troubleshot
• troublesome
• troublesomely
• troublesomeness
• troublesomenesses
• trouble someone for
• trouble spot
• trouble spots
• trouble-state
• trouble-states
• trouble-town
• trouble-towns
• trouble-world
• trouble-worlds
• troubling
• troublings
• troublous
• troublously
• troublousness
• troublousnesses
• trou-de-loup