EN English rhymes from four-letter word to four-wire carrier system
- four-letter word
- four-letter words
- four-masted
- four-masted ship
- four-part
- four-phase modulator
- four-phase operation
- four-phase technique
- four-place
- four-plus-one address
- four-point probe method
- four-pole
- four-pole analysis
- four-pole connection
- four-pole determinant
- four-pole dissection
- four-pole equation
- four-pole matrix
- four-pole network
- four-pole parameter
- four-pole transformation
- four-pole wave
- four-port
- four-port circulator
- four-port network
- four-poster
- four-poster bed
- four-quad series array
- four-quadrant drive
- four-quadrant multiplier
- four-quadrant operation
- four-row
- four-sided
- four-speed gear
- four-step
- four-stroke
- four-terminal equation
- four-terminal network
- four-thousander
- four-to-two-wire
- four-valued
- four-way box
- four-way system
- four-wheel
- four-wheel drive
- four-wheeler
- four-wire
- four-wire amplifier
- four-wire bus
- four-wire carrier system