OROGENY

Set to 3 different clues across 3 published puzzles, most often “Process of mountain building” — The New York Times, Friday, 15 January 2010.

7 letters

Every clue on record, most used first

Process of mountain buildingonce
The New York Times — Friday, 15 January 2010
Mountain-making process, in geologyonce
The New York Times — Saturday, 4 November 2000
Process of mountain formationonce
The New York Times — Sunday, 5 November 1995