| bonanza(noun, source, vein, excavation) |
| vein(noun, source, excavation, coalfield) |
| mine(noun, supply, deposit, excavation) |
| colliery(noun, excavation, coalfield, coalmine) |
| fount(noun, excavation, coalfield, coalmine) |
| fountain(noun, excavation, coalfield, coalmine) |
| lode(noun, excavation, coalfield, coalmine) |
| quarry(noun, excavation, coalfield, coalmine) |
| shaft(noun, excavation, coalfield, coalmine) |
| source(noun, excavation, coalfield, coalmine) |
| spring(noun, excavation, coalfield, coalmine) |
| treasure trove(noun, expression, excavation, windfall) |
| treasury(noun, excavation, coalfield, coalmine) |
| well(noun, excavation, coalfield, coalmine) |
| wellspring(noun, excavation, coalfield, coalmine) |
| abundance(noun, excavation, coalfield, coalmine) |
| bed(noun, excavation, coalfield, coalmine) |
| coalface(noun, excavation, coalfield, coalmine) |
| coalfield(noun, excavation, coalmine) |
| coalmine(noun, excavation, coalfield) |