1) Ant constructions 2) Ant mounds 3) Arthur and Anita 4) Bunker and Boot 5) Dry land 6) Earth 7) Elevation 8) Famous septet of Rome 9) Fanny and Sam 10) Ground 11) Inclines 12) Land 13) Mini mountains 14) Monticles 15) Motocross track obstacles 16) Natural elevation 17) Natural elevations 18) Parts of rolling landscapes Found on https://www.crosswordclues.com/clue/hills