Last supper and Passover supper

Last supper noun - The traditional Passover supper of Jesus with his disciples on the eve of his crucifixion.

Passover supper and last supper are semantically related. In some cases you can use "Passover supper" instead a noun phrase "Last supper".

Passover supper noun - (Judaism) the ceremonial dinner on the first night (or both nights) of Passover.

Last supper and Passover supper are semantically related. Sometimes you can replace phrase "Last supper" with "Passover supper", this phrases are similar.