coistrel or coistril /koisˈtril/

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

• counter-irritants
• counter-irritation
• counter-irritations
• counter-jumper
• counter-jumpers
• counterlight
• counterlights
• counterman
• countermand
• countermandable
• countermanded
• countermanding
• countermands
• countermarch
• countermarched
• countermarches
• countermarching
• countermark
• countermarks
• countermeasure
• countermeasures
• countermen
• countermine
• countermined
• countermines