Jam and Obstacle

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

Obstacle and jam are semantically related in obstruction topic. In some cases you can use "Obstacle" instead a noun "Jam".

Nearby Word: jamming

Obstacle noun - Something that makes movement or progress difficult.

Jam and obstacle are semantically related in obstruction topic. Sometimes you can use "Jam" instead a noun "Obstacle".