collier
oxford
views 3,381,267 updated Jun 08 2018col·lier / ˈkälyər/ •
n. chiefly Brit. 1. a coal miner.2. a ship carrying coal.
The Oxford Pocket Dictionary of Current English
collier
oxford
views 3,468,627 updated Jun 11 2018collier †charcoal-burner XIV; coal-miner XVI. ME. colyer, f. col COAL; see -IER.
Hence colliery XVII.
The Concise Oxford Dictionary of English Etymology T. F. HOAD