18-letter words containing h, o, m, c
- systematic phoneme — a phonological unit in generative phonology representing an underlying form that takes into account the relationship between phonological patterns and morphological variation, as the unit underlying the second vowel in both derive and derivative.
- tetrachloromethane — carbon tetrachloride.
- the black mountain — a mountain range in S Wales, in E Carmarthenshire and W Powys. Highest peak: Carmarthen Van, 802 m (2632 ft)
- the family compact — the ruling oligarchy in Upper Canada in the early 19th century
- the uncircumcision — the gentiles
- thermionic current — an electric current produced by the flow of thermions.
- thermoelectrometer — an instrument for measuring a charge or voltage by means of the heat it produces in a resistance.
- thermoluminescence — phosphorescence produced by the heating of a substance.
- thermonuclear bomb — hydrogen bomb.
- thioantimonic acid — a hypothetical acid, H3SbS4, known only in the form of its salts
- to come unstitched — to go wrong or awry
- to cut the mustard — If someone does not cut the mustard, their work or their performance is not as good as it should be or as good as it is expected to be.
- to meet your match — If you meet your match, you find that you are competing or fighting against someone who you cannot beat because they are as good as you, or better than you.
- to take the mickey — If you take the mickey out of someone or something, you make fun of them, usually in an unkind way.
- two-chamber system — the system of having two parliamentary chambers, as the House of Lords and the House of Commons in the United Kingdom
- vermilion rockfish — a scarlet-red rockfish, Sebastes miniatus, inhabiting waters along the Pacific coast of North America, important as a food fish.
- watchdog committee — a committee responsible for monitoring standards of behaviour
- what has become of — If you wonder what has become of someone or something, you wonder where they are and what has happened to them.
- white-collar crime — any of various crimes, as embezzlement, fraud, or stealing office equipment, committed by business or professional people while working at their occupations.
- widemouth blindcat — any of several catfishes, as Satan eurystomus (widemouth blindcat) of Texas, that inhabit underground streams and have undeveloped eyes and unpigmented skin.
- world championship — an international competition in a particular sport or activity for people all around the world
- writ of attachment — a document by which a court orders the seizing of property in order to ensure satisfaction of a judgement