protrusion Antonyms

con-cavity scallop recess notch intaglio indention indentation indenting ichnolite sipe sinus sulcus cutout alveolation sinkhole punch bowl cavitied blues trough trench ichnite honeycomb groove cavern cave bowl basin armpit antrum alveolus alcove cavity collapse concave follicle embrasure dint dimple depression dent crenel concavity absorb