knoll

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To ring mournfully; knell.
• intransitive verb To ring or sound (a bell, for example) mournfully; knell.
• noun A knell.
• noun A small rounded hill or mound; a hillock.

from The Century Dictionary.

• noun The ringing of a bell: as, the curfew knoll.
• To ring, as a bell; especially, to ring slowly, for or as for a funeral; toll; knell.
• To ring or sound a knell for; warn or draw by the sound of a bell.
• To sound, as a bell; ring.
• noun The top or crown of a hill; more generally, a small, gently rounded hill or mount.
• noun A turnip.

from the GNU version of the Collaborative International Dictionary of English.

• noun A little round hill; a mound; a small elevation of earth; the top or crown of a hill.
• noun rare The tolling of a bell; a knell.
• intransitive verb To sound, as a bell; to knell.
• transitive verb To ring, as a bell; to strike a knell upon; to toll; to proclaim, or summon, by ringing.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A small mound or rounded hill.
• noun A knell.
• verb To ring (a bell) mournfully: to knell.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a small natural hill