18-letter words containing h, e, i
- the encyclopedists — the writers of the French Encyclopedia (1751-72) edited by Diderot and d'Alembert, which contained the advanced ideas of the period
- the family compact — the ruling oligarchy in Upper Canada in the early 19th century
- the final solution — the code name used by the Nazis to refer to the plan of mass murder of the Jews
- the first sea lord — the senior of the two serving naval officers who sits on the admiralty board of the Ministry of Defence
- the french riviera — the Mediterranean coastal region of France from Cannes eastward to Italy
- the general public — the people in a society; people in general
- the grand national — an annual steeplechase run at Aintree, Liverpool, since 1839
- the hand of fatima — a symbol of a hand used in some Arabic countries to protect against the evil eye, a magical power
- the heebie-jeebies — apprehension and nervousness
- the hotel industry — the branch of the services industry which provides hotels
- the intelligentsia — the educated or intellectual people in a society or community
- the internationale — a revolutionary socialist hymn, first sung in 1871 in France
- the kinetic theory — a theory of gases postulating that they consist of particles of negligible size moving at random and undergoing elastic collisions
- the magnolia state — a nickname referring to Mississippi
- the major rogation — April 25, observed by Christians as a day of solemn supplication for the harvest and marked by processions, special prayers, and blessing of the crops
- 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 middle passage — the journey across the Atlantic Ocean from the W coast of Africa to the Caribbean: the longest part of the journey of the slave ships sailing to the Caribbean or the Americas
- the mountain state — a nickname referring to West Virginia
- the movie industry — the industry that makes entertainment films or movies
- the nether regions — the genitals
- the north atlantic — the northern part of the Atlantic Ocean, especially the waters separating North America and Europe
- the northern irish — the people who live in or come from Northern Ireland
- the operative word — If you describe a word as the operative word, you want to draw attention to it because you think it is important or exactly true in a particular situation.
- the practicalities — the real facts or details of a situation, as opposed to its theoretical aspects
- the south atlantic — the part of the Atlantic Ocean that lies to the south of the equator
- the sun also rises — a novel (1926) by Ernest Hemingway.
- the sunshine state — the nickname of the US state of Florida, which comes from its sunny climate
- the three wise men — the wise men from the east who came to do homage to the infant Jesus
- the uncircumcision — the gentiles
- the-cocktail-party — a play in verse (1950) by T. S. Eliot.
- the-dark-continent — Africa: so called, especially during the 19th century, because little was known about it.
- the-master-builder — a play (1892) by Ibsen.
- theodore gericault — (Jean Louis André) Théodore [zhahn lwee ahn-drey tey-aw-dawr] /ʒɑ̃ lwi ɑ̃ˈdreɪ teɪ ɔˈdɔr/ (Show IPA), 1791–1824, French painter.
- there you go again — Phrases such as there you go again are used to show annoyance at someone who is repeating something that has annoyed you in the past.
- there's no telling — You use there's no telling to introduce a statement when you want to say that it is impossible to know what will happen in a situation.
- therese de lisieux — Saint (Marie Françoise Thérèse Martin"the Little Flower") 1873–97, French Carmelite nun.
- thermal efficiency — the ratio of the work output of a heat engine to the heat input expressed in the same units of energy.
- thermionic current — an electric current produced by the flow of thermions.
- thermoluminescence — phosphorescence produced by the heating of a substance.
- thin on the ground — If people or things of a particular kind are thin on the ground, there are very few of them.
- think the world of — the earth or globe, considered as a planet.
- thioarsenious acid — any of a group of hypothetical acids, H3AsS3, HAsS2, and H4As2S5, known only in the forms of their salts
- third man argument — (in the philosophy of Aristotle) the argument against the existence of Platonic Forms that since the Form of Man is itself a perfect man, a further form (the "third" man) would be required to explain this, and so ad infinitum
- thirty-second note — a note having 1/32 of the time value of a whole note; demi-semiquaver.
- thirty-second rest — a rest equal in value to a thirty-second note.
- thomas alva edison — Thomas Alva [al-vuh] /ˈæl və/ (Show IPA), 1847–1931, U.S. inventor, especially of electrical devices.
- thorfinn karlsefni — 980–after 1007, Icelandic navigator, explorer, and leader of early colonizing expedition to Vinland, in North America.
- thought experiment — Physics. a demonstration or calculation that is based on the postulates of a theory, as relativity, and that demonstrates or clarifies the consequences of the postulates.
- threatened species — a species likely, in the near future, to become an endangered species within all or much of its range.
- three-day eventing — participation in a three day equestrian competition consisting of dressage, cross-country jumping, and stadium jumping