mound Antonyms

alveolation ravine pothole pocket plateau oriel nook niche meadow kloof intervale hollow gully gulch grotto grot rut scissure sinus borehole nullah mineshaft punch bowl bottomland cwm cavitied valley vale trough swale strath socket snowflake slade goffer glen glade combe clough cavity cavernous cavern canyon bottom bastard basin asinine arroyo armpit apse