letter bomb
parcel bomb
package bomb

The main difference was that the package bomb in Maryland contained two pipe bombs, only one of which exploded.

Officials refused to confirm or deny reports that two unexploded package bombs were recovered from trains.

A package bomb mailed to a Queens address exploded in the lap of an 18-year-old pregnant woman yesterday afternoon, the police said.

A package bomb blew out the plate-glass front windows three years ago.

He was killed by a package bomb in his house.

Officials said it was similar in several ways to the package bombs found in the South.

How many people in Ford County knew how to make package bombs?

They were removed to prevent would-be terrorists from dropping package bombs in them.

It was hard to believe Lyda was re-sponsible for the package bomb, let alone her husband's death two years before.

The bomb and the letters, like many of the previous package bombs, carried postmarks from cities in Northern California.