Ros·tro·po·vich 
(rŏs′trə-pōvĭch, rə-strə-), Mstislav Leopoldovich 1927-2007.
(rŏs′trə-pōvĭch, rə-strə-), Mstislav Leopoldovich 1927-2007. Russian cellist and conductor of the National Symphony Orchestra in Washington, DC (1977-1994).
- four-footed
- fourgon
- fourhanded
- Four-H Club
- Four Horsemen of the Apocalypse
- Four Hundred
- Fourier
- Fourier analysis
- Fourierism
- Fourierist
- Fourierite
- Fourier series
- Fourier transform
- four-in-hand
- four-leaf clover
- four-letter word
- four-o'clock
- four-peat
- fourpenny nail
- fourplex
- four-poster
- fourragère
- fourscore
- foursome
- foursquare