OLEFIN
Set to 2 different clues across 2 published puzzles, most often “Alkene series hydrocarbon” — The New York Times, Saturday, 24 May 2003.
6 letters
Every clue on record, most used first
- Alkene series hydrocarbononce
The New York Times — Saturday, 24 May 2003
- Herculon's fiberonce
The New York Times — Thursday, 9 March 2000