yuboketsugan
1. oil shale
Noun
#555536
1. oil shale
1. Oil shale
1. In oil shale
1. It is not oil shale.
1. Was not oil shale.; Was not shale containing oil.
1. Oil shale.
1. It was oil shale.
1. Probably shale.
1. Not oil shale.
1. It is not oil shale.