piedmont slopepiemontite or piedmontite or piedmontitepierpier dampier footingpier foundationpier nosepiercement domepiercing fold or diapir or diapirpiercing pointpierrotitepiezoelectricitypiezogenepiezoglypt or regmaglypt or regmaglyptpiezomagnetismpiezometerpiezometer headpiezometer tubepigeonitepiggy – backpigment mineralpilepile cappile drivingpile driving resistancepile footpile foundationpile framepile grouppile hammerpile headpile helmetpile loadpile shoepile weirpiled foundationpiliferouspilingpiling framepiling rigpillpillaitepillarpillar robbingpillar structurepillow basalt or pillow basalts or pillow basaltspillow lava or pillowlava or pillowlavapillow structurepilonidal sinus or nest of hairs or nest of hairspilose