14-letter words containing p, r, a, d
- waste products — the useless products of bodily processes
- water dropwort — any of several umbelliferous marsh plants of the genus Oenanthe, with umbrella-shaped clusters of white flowers
- weatherproofed — Simple past tense and past participle of weatherproof.
- well-practiced — skilled or expert; proficient through practice or experience: a practiced hand at politics.
- well-practised — having or having been habitually or frequently practised in order to improve skill or quality
- wide-spreading — spreading over or covering a large area: wide-spreading showers; wide-spreading ivy.
- world champion — someone who has won a competition open to people throughout the whole world
- xeroradiograph — an x-ray utilizing a specially coated plate that allows a picture to be developed without the use of liquid chemicals.
- zeno's paradox — any of various versions of a paradox regarding the relation of the discrete to the continuous and requiring the concept of limit for its satisfactory explanation.