1) An anagram for slave 2) Areas between hills 3) Classical farewells 4) Glens 5) Gorges 6) Hollows between hills 7) Hollows, to Keats 8) Landscape dips 9) Low areas 10) Low places 11) Low points 12) Low-lying areas 13) Low-lying lands 14) Lowlands, to poets 15) Natural depressions 16) Places between hills 1) Dells