Converse of object

• undertake: If the Saturday sailing operated an hour later it would provide trippers with the opportunity to undertake a round trip on the Steam Railroad.

• do: Then he did the round trip in 13 hours, and won the bet.

• face: City now face a fourth round trip to Southampton on a date to be arrranged in January.

Adjective modifier

• long: The first was a week long round trip on the north/south commuter that runs between Seattle and Los Angeles.