19-letter words containing p, r, e, i, n, f
- specific resistance — resistivity (def 2).
- specific-resistance — the power or property of resistance.
- specular reflection — Specular reflection is reflection of heat or light in which the angles of different parts of the surface are important.
- sphere of influence — any area in which one nation wields dominant power over another or others.
- splinterproof glass — glass that is designed not to form sharp splinters should it be shattered
- spread oneself thin — to draw, stretch, or open out, especially over a flat surface, as something rolled or folded (often followed by out).
- succession of crops — the continuous cultivation of a crop throughout a season by successive plantings or by the use of varieties with different rates of growth.
- superannuation fund — a fund used for paying pensions
- superhigh frequency — any frequency between 3000 and 30,000 megahertz. Abbreviation: SHF.
- the patriotic front — a political party in Zimbabwe, founded in 2001 as a coalition of two communist parties, the Zimbabwe African Peoples Union (ZAPU) and the Zimbabwe African National Union (ZANU), which had worked together to fight against White minority rule in Rhodesia
- to one's fingertips — entirely; altogether
- upper carboniferous — Pennsylvanian (defs 2, 4).
- war of independence — American Revolution.
- whorfian hypothesis — Sapir-Whorf hypothesis.