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

• hazarded
• hazarding
• hazardize
• hazardizes
• hazard lights
• hazardous
• hazardously
• hazardousness
• hazardousnesses
• hazard pay
• hazardries
• hazardry
• hazards
• hazard warning lights
• Hazchem
• haze
• hazed
• hazel
• hazel grouse
• hazel hen
• hazelly
• hazelnut
• hazelnuts
• hazels
• hazer