trench Antonyms

outthrust protuberance protrusion promontory prominence projection peninsula overhang outshoot mountain mesa marge mantel lip ledge knur knap intumescence reef ridge munro kyphosis kopje gibbousness sand bar outcropping mt tumulus tump tuberosity top thalamus skerry sill sierra shoal rock inflation hummock holt condyle climax cliff choline cay capsheaf cape butte buoyancy bunch