| Answer | Crossword Clue |
|---|---|
| OROGENY | Process of mountain formation |
| OROGENY | The process of mountain formation |
| OSTOSIS | Process of bone formation |
| OROGENIC | Of mountain formation |
| MASSIF | Mountain formation |
| SIERRA | Mountain formation. |
| ARETE | Mountain formation. |
| RIDGE | Mountain formation. |
| MASSIF | Mountain formation. |
| ARETE | Rocky mountain formation. |
| AMBA | Table-mountain formation in Africa. |
| ALP | High mountain, in a certain back-formation |
