21-letter words containing p, u, d, l, e
- school superintendent — an official whose job is to oversee school administration within a district
- sinusoidal projection — an equal-area projection in which parallels are straight lines spaced at regular intervals, the central meridian is a straight line one-half the length of the equator, and the other meridians are curves symmetrical to the central meridian.
- sodium metabisulphite — an inorganic compound with the chemical formula Na2S2O5 that is used as a preservative, antioxidant and disinfectant
- supply-side economics — a school of economic thought that emphasizes the importance to a strong economy of policies that remove impediments to supply
- the slough of despond — a state of extreme despondency, depression or degradation
- up close and personal — face to face, intimately
- up hill and down dale — strenuously and persistently
- white-knuckle paddler — an inexpert and timid canoeist.
- yellow-rumped warbler — a common North American wood warbler, Dendroica coronata, having yellow spots on the rump, crown, and sides, including a white-throated eastern subspecies (myrtle warbler) and a yellow-throated western subspecies (Audubon's warbler)