割り楔[warikusabi] split wedge
楔形[kusabigata] wedge-shape
楔形文字[kusabigatamoji] cuneiform (writing)
楔石[kusabiishi] keystone
楔状[ketsujou] wedge-shaped

楔状骨[ketsujoukotsu] cuneiform (bones)
楔子[kesshi] wedge
合いの楔[ainokusabi] wedge (for securing objects together)
氷楔[hyousetsu] ice wedge

せん状骨[senjoukotsu] scaphoid bone (in wrist near thumb)
挨拶状[aisatsujou] greeting card
依頼状[iraijou] written request
委任状[ininjou] commission
異状[ijou] something wrong

遺言状[yuigonjou] will
渦状[kajou] spiral
液状[ekijou] liquid state
円盤状[enbanjou] disk-shaped
仮免状[karimenjou] temporary certificate