Noah Webster
Knoll
KNOLL, verb transitive noll. [See Knell.] To ring a bell, usually for a funeral.
KNOLL, verb intransitive noll. To sound, as a bell.
[This word, I believe, is not used in America.]
KNOLL, noun noll. The top or crown of a hill; but more generally, a little round hill or mount; a small elevation of earth.