12-letter words containing r, d, f
- woodruff key — a key having the form of a nearly semicircular disk fitting into a recess in a shaft.
- word-perfect — correct in every detail
- world's fair — a large international exposition with exhibitions of arts, crafts, industrial and agricultural products, scientific achievements, etc.
- world-famous — famous throughout the world: a world-famous film.
- zero defects — quality control that strives for a perfect production process, resulting in flawless products.