hackmatack /hakˈmə-tak/

1. An American larch
2. Its wood

• sixth-former
• sixth-formers
• sixth forms
• sixthly
• sixths
• sixth sense
• sixties
• sixtieth
• sixtieths
• sixty
• sixty-four-dollar question
• sixty-fourth note
• sixty-fourth notes
• sixty-four-thousand-dollar question
• sixty-nine
• sizable
• sizably
• sizar
• sizars
• sizarship
• sizarships
• size
• sizeable
• sizeably
• sized