Knoll

knoll
knoll /nəʊl $ noʊl/ noun [countable]a small round hill
     

THESAURUS

   ▪ mountain a very high hill: the highest mountain in Austria
   ▪ hill an area of land that is higher than the land around it, which is like a mountain but smaller and usually has a rounded top: We went for a walk in the hills. | The house is surrounded by woods, farmland and gentle hills.
   ▪ Mount (also Mt written abbreviation) used in the names of mountains. Don’t say ‘Fuji Mountain’ – say ‘Mount Fuji’: Mount Everest
   ▪ cliff the steep side of an area of land, often next to the sea: the white cliffs of Dover
   ▪ precipice especially literary a very steep and dangerous cliff: They were standing on the edge of a precipice.
   ▪ crag a high steep rock or mountain: An eagle sailed over the high crags.
   ▪ ridge a long narrow area of high ground, especially at the top of a mountain: I could see a group of climbers high up on a ridge.
   ▪ knoll a small round hill: a grassy knoll
   ▪ volcano a mountain with a large hole at the top, through which lava (=hot liquid rock) is sometimes forced out: the eruption of a volcano
   ▪ summit the very highest point of a mountain: the summit of Mt Everest
   ▪ peak especially literary the top of a mountain: the snow-covered peaks of the Himalayas | a distant peak
   ▪ range/chain a group of mountains or hills arranged in a line: the mountain range that is part of the border between Norway and Sweden
   ▪ foothills a group of smaller hills below a range of high mountains: the Sierra foothills