18-letter words containing a, h, o, l
- woman of the world — a woman experienced and sophisticated in the ways and manners of the world, especially the world of society.
- world championship — an international competition in a particular sport or activity for people all around the world
- xenon hexafluoride — a colorless, crystalline compound, XeF 6 , that melts at 50°C to a yellow liquid, and boils at 75°C.