17-letter words containing t, r, o, i, l, s
- ultraconservative — extremely conservative, especially in politics.
- ultrametamorphism — metamorphism during which the temperature of a rock exceeds its melting point.
- unofficial strike — a strike that is not approved by the strikers' trade union
- unreconstructible — not capable of being reconstructed.
- urogenital system — the urinary tract and reproductive organs
- visible radiation — electromagnetic radiation that causes the sensation of sight; light. It has wavelengths between about 380 and 780 nanometres
- visitors' gallery — a balcony in a building such as a parliament or court where members of the public can sit
- wang laboratories — (body) Computer manufacturer, known for their office automation products and the Wang PC. Quarterly sales $208M, profits $3M (Aug 1994).
- whistler's mother — (formal name, Arrangement in Gray and Black No. 1: Portrait of the Artist's Mother) a painting (1871) by James McNeill Whistler.
- wireless operator — a radio operator
- worth one's while — a period or interval of time: to wait a long while; He arrived a short while ago.
- yellowstone river — river flowing from NW Wyo. through Mont. into the Missouri River: 671 mi (1,080 km)
- zebra swallowtail — a swallowtail butterfly, Papilio marcellus, having black and greenish-white stripes on the wings.