17-letter words containing h, i, t, o, r
- washington square — a short novel (1881) by Henry James.
- wheatstone bridge — a circuit for measuring an unknown resistance by comparing it with known resistances.
- 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.
- white book cd-rom — (hardware, standard) A more open CD-ROM standard than Green Book CD-ROM. All films mastered on CD-ROM after March 1994 use White Book. Like Green Book, it is ISO 9660 compliant, uses mode 2 form 2 addressing and can only be played on a CD-ROM drive which is XA (Extended Architecture) compatible. White book CDs are labelled "Video CD".
- willow flycatcher — a North American flycatcher, Empidonax alnorum, of alder thickets and other moist areas, that has greenish-brown upper parts and whitish underparts and is almost indistinguishable except by voice from E. traillii (willow flycatcher)
- wind chill factor — A wind chill factor is a measure of the cooling effect of the wind on the temperature of the air.
- wind-chill factor — the apparent temperature felt on the exposed human body owing to the combination of temperature and wind speed.
- winter heliotrope — a creeping perennial, Petasites fragrans, related to the butterbur, having lilac to heliotrope-coloured flowers smelling of vanilla: found chiefly on road verges
- withdrawal method — a method of contraception in which the man withdraws his penis from the woman's vagina before ejaculation
- without prejudice — fairly
- without regard to — with no concern for
- world without end — for ever
- worth one's while — a period or interval of time: to wait a long while; He arrived a short while ago.
- write the book on — to be the definitive authority or expert on
- yorkshire terrier — one of an English breed of toy terriers having a long, silky, straight coat that is dark steel blue from the back of the skull to the tail and tan on the head, chest, and legs.
- youth programming — the creation and scheduling of television programmes specifically aimed at young people