titter¹/ʹtitə/ verb intrans (tittered, tittering)

titter²noun

• resistivity
• resistless
• resistor
• resit
• resize
• res judicata
• resoluble
• re-soluble
• resolute
• resolution
• resolve
• resolvent
• resolving power
• resonance
• resonant
• resonate
• resonator
• resorb
• resorcinol
• resorption
• resort
• resound
• resounding
• resource
• resourceful