15-letter words containing h, a, r, l, d, i
- the cordilleras — the complex of mountain ranges on the W side of the Americas, extending from Alaska to Cape Horn and including the Andes and the Rocky Mountains
- the daily round — the usual activities of one's day
- thiocarbanilide — a gray powder, C 13 H 12 N 2 S, used as an intermediate in dyes and as an accelerator in vulcanization.
- thorndike's law — the principle that all learnt behaviour is regulated by rewards and punishments, proposed by Edward Lee Thorndike (1874–1949), US psychologist
- thursday island — an island in Torres Strait between NE Australia and New Guinea; part of Queensland: pearl fishing. 1½ sq. mi. (4 sq. km).
- tidal benchmark — a benchmark used as a reference for tidal observations.
- trichomonacidal — relating to a trichomonacide
- unrehabilitated — to restore to a condition of good health, ability to work, or the like.
- wheelchairbound — Confined to a wheelchair.
- whip-tailed ray — a whipray.
- winter holidays — a period of rest from work or studies taken in winter
- withdrawal slip — a small paper form which has to be filled in before making a withdrawal of money from a bank, building society, etc
- working holiday — trip combining vacation with job experience
- yorkshire dales — the valleys of the rivers flowing from the Pennines in W Yorkshire: chiefly Ribblesdale, Swaledale, Nidderdale, Wharfedale, and Wensleydale; tourist area