ff or ff.

1. Fecerunt (Latin), (they) did it or made it
2. Folios (printing)
3. Following pages, lines, etc
4. Fortissimo (music)

FF

1. Form feed (computing)
2. French franc or francs

• northed
• norther
• northered
• northering
• northerlies
• northerliness
• northerlinesses
• northerly
• northermost
• northern
• northern and southern hemispheres
• northern and southern lights
• northerner
• northerners
• northern fern
• northern ferns
• northern hemisphere
• northernise
• northernised
• priory
• prisade
• prisage
• prisages
• Priscianist
• prise