Jam-packed and Up to the rafters

Jam-packed adjective - Containing or seeming to contain the greatest quantity or number possible.

Up to the rafters and jam-packed are semantically related In some cases you can use "Up to the rafters" instead an adjective phrase "Jam-packed".

Jam-packed and up to the rafters are semantically related in full topic. You can use "Jam-packed" instead an adjective phrase "Up to the rafters", if it concerns topics such as blocked.