| Answer | Crossword Clue |
|---|---|
| MINE | Abundant source |
| WELLSPRING | Abundant source |
| FOUNT | Abundant source |
| FOUNTAIN | Abundant source |
| COAL | Abundant source of energy |
| COAL | U.S.'s most abundant energy source |
| Answer | Crossword Clue |
|---|---|
| MINE | Abundant source |
| WELLSPRING | Abundant source |
| FOUNT | Abundant source |
| FOUNTAIN | Abundant source |
| COAL | Abundant source of energy |
| COAL | U.S.'s most abundant energy source |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.