18-letter words containing a, r, k, h, n
- the masurian lakes — a group of lakes in Masuria in NE Poland: scene of Russian defeats by the Germans (1914, 1915) during World War I
- the northern karoo — a high arid plateau in South Africa, north of the Central Karoo
- the-dark-continent — Africa: so called, especially during the 19th century, because little was known about it.
- thorfinn karlsefni — 980–after 1007, Icelandic navigator, explorer, and leader of early colonizing expedition to Vinland, in North America.
- under the jackboot — If a country or group of people is under the jackboot, they are suffering because the government is cruel and undemocratic.
- wernicke's aphasia — a type of aphasia caused by a lesion in Wernicke's area of the brain and characterized by grammatical but more or less meaningless speech and an apparent inability to comprehend speech.
- westinghouse brake — a railroad air brake operated by compressed air.