15-letter words containing c, h, e, s, l, o
- wentworth scale — a scale for specifying the sizes (diameters) of sedimentary particles, ranging from clay particles (less than 1⁄256 mm) to boulders (over 256 mm)
- western hemlock — a tall, narrow hemlock, Tsuga heterophylla, of western North America: the state tree of Washington.
- white corpuscle — white blood cell.
- zygophyllaceous — belonging to the Zygophyllaceae, the caltrop family of plants.