knoll Synonyms

mound hillock elevation hammock eminence rise hummock tumulus barrow summit tor tump tumuli motte slope rock ridge protuberance promontory prominence mountain mount upland altocumulus small hill hummocks re-echo moundlet high ground sand dune Downs oka cronk Ararat kopje anthill howe Kennedy koppie monticule formicary foothill fell esker embankment dune drumlin drift down crest