1.   A longer course was offset by soft and receptive greens instead of treacherous ones.

2.   It is a bold strategy, and a treacherous one.

3.   Stories of brave souls and treacherous ones.

4.   The altered political landscape is a treacherous one.

5.   The battlefield is a treacherous one for both parties.

6.   The course chosen by California and the other states on its side seems a treacherous one.

7.   The path he chose was a treacherous one, and Sullivan apparently jogged over a cliff.

8.   The realm of emotion and feeling is a treacherous one for science.

9.   He said he expected a slow and difficult commute into the city but a more treacherous one out in the afternoon and evening.