What is another word for colli?
Pronunciation: [kˈɒli] (IPA) 
"Colli" is a relatively uncommon word, referring to a coal mine or a coal seam. However, there are several synonyms that can be used instead. The most common would likely be "coal mine" or simply "mine." Other synonyms include "pit" (often used in reference to an open-pit coal mine), "shaft" (referring to a vertical mine access point), and "adit" (referring to a horizontal mine access point). Additionally, "coal face" can be used to refer to the location within a mine where coal is currently being extracted. Finally, "seam" can be used to refer to the layer of coal itself, rather than the mine that is extracting it.
