| A | B |
| generate | to produce or originate; to manufacture |
| heath | an area of open wasteland |
| opacity | state of not letting light through; impenetrability |
| pallid | lacking color; pale |
| firmament | the sky or heavens |
| retard | to slow down; to decelerate |
| tract | land; region or area without definite boundaries |
| transitional | related to change |
| vast | large; huge in bulk; unbounded; immense |
| precise | exact; clear; well-defined |