Crossword puzzle clue "concave landform"

a valley

a coral island consisting of a reef surrounding a lagoon

(Scots) a steep bank beside a river valley

(French) an isolated hill rising abruptly from the surrounding area, having steep sides and a flat top

to form cavities in a surface

an alluvial deposit at the mouth of a river

to stuff with food

(Latin) a strip of land connecting two larger land masses