11-letter words containing s, e, p, t, n, i
- ununseptium — a superheavy, synthetic, radioactive element with a short half-life. Symbol: Uus; atomic number: 117.
- uprightness — erect or vertical, as in position or posture.
- uptightness — the quality or state of being uptight
- vespertinal — of, relating to, or occurring in the evening: vespertine stillness.
- westphalian — a former province in NW Germany, now a part of North Rhine-Westphalia: treaty ending the Thirty Years' War 1648.
- white aspen — any of various poplars, as Populus tremula, of Europe, and P. tremuloides (quaking aspen) or P. alba (white aspen) of America, having soft wood and alternate ovate leaves that tremble in the slightest breeze.
- whiteprints — Plural form of whiteprint.
- witherspoon — John, 1723–94, U.S. theologian and statesman, born in Scotland.
- xenoplastic — involving distantly related individuals
- xiphisterna — Plural form of xiphisternum.