- well - a deep hole or shaft dug or drilled to obtain water or oil or gas or brine
--1 is a kind of writer, author; excavation, hole in the ground; writer, author; excavation, hole in the ground
--1 has particulars:artesian well; driven well, tube well; gas well; oil well, oiler; sump - well - a cavity or vessel used to contain liquid
--2 is a kind of vessel; vessel
--2 has particulars: inkwell, inkstand- well, wellspring, fountainhead - an abundant source; "she was a well of information"
--3 is a kind of source; source
- well - an open shaft through the floors of a building (as for a stairway)
--4 is a kind of shaft; shaft
--4 has particulars: stairwell- well - an enclosed compartment in a ship or plane for holding something as e.g. fish or a plane's landing gear or for protecting something as e.g. a ship's pumps
--5 is a kind of compartment; compartment
--5 has particulars: bilge well; pump well - well - a cavity or vessel used to contain liquid