octahedron/oktəʹheedrən/ noun (pl octahedrons octahedra /-drə/)

• forever
• for evermore
• forevermore
• forewarn
• forewent
• forewing
• forewoman
• foreword
• for example
• for fear of/that
• forfeit
• forfend
• for free
• forgather
• forgave
• forge
• forge ahead
• forgery
• forget
• forgetful
• forget-me-not
• forget oneself
• forgettable
• forgive
• forgiveness