18-letter words containing r, h, o, d, p, s
- sound spectrograph — an electronic device for recording a sound spectogram.
- spotted flycatcher — a European woodland songbird, Muscicapa striata, with a greyish-brown streaked plumage: family Muscicapidae (Old World flycatchers)
- temporary hardness — hardness of water due to the presence of magnesium and calcium hydrogencarbonates, which can be precipitated as carbonates by boiling
- the lords temporal — (in Britain) peers other than bishops in their capacity as members of the House of Lords
- thiosulphuric acid — an unstable acid known only in solutions and in the form of its salts. Formula: H2S2O3
- to sweep the board — If someone sweeps the board in a competition or election, they win nearly everything that it is possible to win.
- triphosphoric acid — the hypothetical acid H 5 P 3 O 10 , known chiefly by its salts.
- withdrawal symptom — effects of stopping a drug
- world championship — an international competition in a particular sport or activity for people all around the world