tetravalent/tetrəʹvaylənt/ adj

• prefer
• preferable
• preferably
• preference
• preference share
• preferential
• preferment
• prefigure
• prefix
• preform
• prefrontal
• preggers
• preglacial
• pregnable
• pregnancy
• pregnant
• preheat
• prehensile
• prehension
• prehistoric
• prehistorical
• prehistory
• preignition
• preindustrial
• prejudge