18-letter words containing c, a, d, u, i
- spackling compound — spackle
- submarine sandwich — a sandwich made with a long cylindrical bread roll
- subordinate clause — a clause that modifies the principal clause or some part of it or that serves a noun function in the principal clause, as when she arrived in the sentence I was there when she arrived or that she has arrived in the sentence I doubt that she has arrived.
- subsidiary company — a company whose controlling interest is owned by another company.
- sulfuric anhydride — sulfur trioxide.
- summary proceeding — a mode of trial authorized by statute to be held before a judge without the usual full hearing.
- superciliary ridge — browridge.
- tertiary education — education, following secondary education at a school, at a college or university
- theodore gericault — (Jean Louis André) Théodore [zhahn lwee ahn-drey tey-aw-dawr] /ʒɑ̃ lwi ɑ̃ˈdreɪ teɪ ɔˈdɔr/ (Show IPA), 1791–1824, French painter.
- thioarsenious acid — any of a group of hypothetical acids, H3AsS3, HAsS2, and H4As2S5, known only in the forms of their salts
- thiosulphuric acid — an unstable acid known only in solutions and in the form of its salts. Formula: H2S2O3
- ultrasonic welding — the use of high-energy vibration of ultrasonic frequency to produce a weld between two components which are held in close contact
- under-compensation — to compensate or pay less than is fair, customary, or expected.
- under-depreciation — decrease in value due to wear and tear, decay, decline in price, etc.
- unearned increment — the increase in the value of property, especially land, due to natural causes, as growth of population, rather than to any labor or expenditure by the owner.
- upper middle class — wealthy, highly-educated people
- video surveillance — a system of monitoring activity in an area or building using a television system in which signals are transmitted from a television camera to the receivers by cables or telephone links forming a closed circuit
- widemouth blindcat — any of several catfishes, as Satan eurystomus (widemouth blindcat) of Texas, that inhabit underground streams and have undeveloped eyes and unpigmented skin.
- wildlife sanctuary — an area where wild animals and plants are protected
- yeast nucleic acid — RNA.