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

• tonneaus
• tonneaux
• tonnell
• -tonner
• tonnes
• tonnish
• tonnishly
• tonnishness
• torqued
• torque meter
• torque meters
• torques
• torque spanner
• torque spanners
• torque wrench
• torque wrenches
• torr
• torrefaction
• torrefactions
• torrefied
• torrefies
• torrefy
• torrefying
• torrent
• torrent-bow