
1) Barrow 2) Burial mound 3) Grave mound 4) Hill 5) Mound
Found on
https://www.crosswordclues.com/clue/tumulus

1) Mound
Found on
https://www.crosswordclues.com/clue/tumulus

Latin, meaning: mound, grave, heap of earth.
Found on
http://archives.nd.edu/ttt.htm

A tumulus (plural tumuli) is a mound of earth and stones raised over a grave or graves. Tumuli also are known as barrows, burial mounds, Hügelgräber, or kurgans, and may be found throughout much of the world. A cairn (a mound of stones built for various purposes), also might be a tumulus originally. A long barrow is a long tumulus, usually for n...
Found on
http://en.wikipedia.org/wiki/Tumulus

barrow-mound; mound of earth over a grave
Found on
http://phrontistery.info/t.html

• (n.) An artificial hillock, especially one raised over a grave, particularly over the graves of persons buried in ancient times; a barrow.
Found on
http://thinkexist.com/dictionary/meaning/tumulus/

A doming or small mound on the crest of a lava flow caused by pressure due to the difference in the rate of flow between the cooler crust and the more fluid lava below
Found on
http://volcano.oregonstate.edu/glossary/1

prehistoric grave form in continental Europe. See burial mound.
Found on
http://www.britannica.com/eb/a-z/t/91

Prehistoric round
barrow or burial mound. ...
Found on
http://www.encyclo.co.uk/local/20688

A doming or small mound on the crest of a lava flow caused by pressure due to the difference in the rate of flow between the cooler crust and the more fluid lava below.
Found on
http://www.encyclo.co.uk/local/21455

A tumulus is a burial or memorial mound, especially one distinguished by size, form, or association.
Found on
http://www.probertencyclopaedia.com/browse/TT.HTM

an artificial mound, esp. over a grave; barrow. · a domelike swelling or mound formed in congealed lava.
Found on
https://www.infoplease.com/dictionary/tumulus

mound, grave, heap of earth.
Found on
https://www.math.ubc.ca/~cass/frivs/latin/latin-dict-full.html
No exact match found.