I came across this useful list of Boer War terms in South Africa and the Boer-British War, Volume I, by J. Castell Hopkins and Murat Halstead
Aarde - Earth, ground
Afgang - Slope
Baas - Master
Beek - Brook
Berg - Mountain (the plural is formed by adding en)
Boer - Farmer
Boom - Tree
Boschveldt - An open plain covered with bush
Broek - Marsh, pool
Buitenlander - Foreigner
Burg - A town
Burgher - A citizen
Commandeer - To levy troops
Commando - A body of armed men
Daal - A valley
Dorp - A village
Drift - A ford
Dusselboom - Pole of an ox wagon
Fontein - A spring or fountain
Gebied - District
Hout - Wood, timber
Inspan - To harness or tether horses or cattle
Jonkher - Gentleman of the Volks Raad
Karroo - A geographical term for a certain district. In Hottentot, a "dry place"
Kerel - A chap, or fellow
Klei - Clay
Kloof - A valley or ravine
Kop or Kopje - A hill or small mountain
Kraal - A place of meeting, headquarters
Kruger - The family name of present president of South African Republic
Krantz - A precipice
Laager - A fortified camp, but often applied to any camp, fortified or not
Landdrost - Local governor
Loop - Course, channel
Modder - Mud
Mooi - Pretty
Nachtmal - Lord's Supper
Nieuwe - New
Oom - Uncle
Pan - Bed of a dried-up salt marsh
Poort - A passage between mountains
Raad - Senate
Raadsher - Senator
Raadhuis - Senate hall
Raadzael - Parliament house
Rand - Edge, margin
Rooinek - Term of contempt applied to British by Boers
Ruggens - A barren, hilly country
Schantze - A heap of stones used to protect a marksman against opposing rifle fire
Slim - Cunning, crafty
Sluit - A ditch
Spruit - Creek
Staat - State
Stad - A town or city
Transvaal - Across the valley
Trek - A journey
Trekken - To travel, or pull away from
Uit - Outside
Uitspan - To unharness, to stop
Uitlander - An outsider or newcomer
Vaal - Valley
Veldt - A prairie, or treeless plain
Veldtheer - The general in command
Vley - A prairie-like meadow
Volks Raad - House of commons or representatives
Voortrekkers - Pioneers
Vrow - Housewife
Witwaterstrand - The edge of the White Water
Zuid - South