Backup and Snarl-up

Backup noun - A crowded mass (as of cars) that impedes or blocks movement.

Snarl-up and backup are semantically related. In some cases you can use "Snarl-up" instead a noun "Backup".

Nearby Word: backing

Snarl-up noun - A number of vehicles blocking one another until they can scarcely move.

Backup and snarl-up are semantically related. Sometimes you can use "Backup" instead a noun phrase "Snarl-up".