13-letter words containing h, i, t, o, r
- whithersoever — Wherever.
- whitlow grass — any of various plants of the genera Draba and Erophila, once thought to cure whitlows: family Brassicaceae (crucifers)
- whoremistress — a female owner or keeper of a brothel
- witching hour — midnight: a rendezvous at the witching hour.
- within reason — a basis or cause, as for some belief, action, fact, event, etc.: the reason for declaring war.
- without demur — If you do something without demur, you do it immediately and without making any protest.
- without tears — presented so as to be easily assimilated
- woolgathering — indulgence in idle fancies and in daydreaming; absentmindedness: His woolgathering was a handicap in school.
- wordsworthian — William, 1770–1850, English poet: poet laureate 1843–50.
- writ of right — English Law. a writ directed to a person who presided over a feudal court, directing him to render justice between his vassals in a dispute as to ownership of land: usually led to a trial in a royal court if feudal ownership was involved.
- xanthochroism — a condition in certain animals, esp aquarium goldfish, in which all skin pigments other than yellow and orange disappear
- xerophthalmia — abnormal dryness of the eyeball characterized by conjunctivitis, caused by a deficiency of tears and attributed to a lack of vitamin A.
- xerophthalmic — Of or pertaining to xerophthalmia.
- xiphiplastron — the fourth lateral plate of a turtle's plastron
- zinjanthropus — the genus to which Australopithecus boisei was formerly assigned.