Enter a clue or pattern or both:

The Clue

Like benzene: Comb. form (4 letter answer)

The Answer

PHEN

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Notes

The answer PHEN is rarely seen, appearing only about once every 1500 puzzles.

Related Clues

Chemical prefix
Chemical suffix
Showing: Comb. form
Fen-___ (banned diet aid)
Fen-___ (diet drug combo)
Fen-___ (former diet drug combo)
Fen-___ (former weight-loss drug)
Weight-loss drug combo fen-___