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

• baregine
• baregines
• barehanded
• bareheaded
• bareknuckle
• bareknuckled
• bareland croft
• bareland crofts
• barelegged
• barely
• bareness
• barenesses
• barer
• bares
• baresark
• barest
• barf
• barfed
• barfing
• barflies
• barfly
• barfly jumping
• barfs
• barful
• bargain