mound Antonyms

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