20-letter words containing a, c, n, t, h
- thermodynamic system — a system whose states of equilibrium can be specified by a few macroscopic properties.
- thioantimonious acid — any of a group of hypothetical acids, H3SbS3, HSbS2, and H4Sb2S5, known only in the forms of their salts in solution
- thirty-nine articles — a set of formulas defining the doctrinal position of the Church of England, drawn up in the 16th century, to which the clergy are required to give general consent
- thomas of erceldoune — Thomas of, Thomas of Erceldoune.
- thought transference — transference of thought by extrasensory means from the mind of one individual to another; telepathy.
- three-thorned acacia — honey locust.
- to blow hot and cold — If someone blows hot and cold, they keep changing their attitude towards something, sometimes being very enthusiastic and at other times expressing no interest at all.
- to reach new heights — to become higher than ever before
- to stick in the craw — to be unacceptable or displeasing to someone
- tom, dick, and harry — the ordinary person; people generally; everyone: They invited every Tom, Dick, and Harry to the party.
- too much information — I don't want to hear any more
- track-laying vehicle — A track-laying vehicle is a vehicle whose wheels run inside a continuous chain or track.
- transposition cipher — a cipher that rearranges the letters of the plain text in a different sequence.
- uncertificated share — a share of a mutual fund credited to the account of a shareholder without the physical issuance of a certificate evidencing ownership.
- uncharacteristically — Also, characteristical. pertaining to, constituting, or indicating the character or peculiar quality of a person or thing; typical; distinctive: Red and gold are the characteristic colors of autumn.
- unified screw thread — a screw thread system introduced for defence equipment (1939–44), in which the thread form and pitch were a compromise between British Standard Whitworth and American Standard Sellers: adopted by the International Standards Organization
- watch someone's back — the rear part of the human body, extending from the neck to the lower end of the spine.
- whyte classification — a system for classifying steam locomotives according to the total number of wheels on the front trucks, drivers, and rear trucks, in that order. For example, a Pacific locomotive is designated as 4-6-2.
- wipe the slate clean — begin afresh
- with a pinch of salt — without wholly believing; sceptically