WImpact crater
WComplex crater
WCrater counting
WCrater depth
WExpanded crater
WHeimdall (Callistonian crater)
WMulti-ringed basin
WPalimpsest (planetary astronomy)
WPeak ring (crater)
WPseudotachylyte
WRajlich's hypothesis
WRay system
WRim (crater)
WSecondary crater
WShatter cone