15-letter words that end in ol
- unleaded petrol — petrol containing a reduced amount of tetraethyl lead
- venetian school — any of various groups of artists identified with Venice throughout the history of Italian art but most notably the painters of the 18th century, as Giovanni Battista Tiepolo, Francesco Guardi, and Antonio Canaletto.
- west hartlepool — a former borough, now part of Hartlepool, in Cleveland County, in NE England, at the mouth of the Tees.
- yin-yang school — a school of ancient Chinese philosophers who interpreted history in terms of the influence of the seasons and of five elements: earth, wood, metal, fire, and water.