King's ransom and Long green

King's ransom noun - A very large amount of money.

Long green and king's ransom are semantically related. In some cases you can use "Long green" instead a noun phrase "King's ransom".

Long green noun - Something (as pieces of stamped metal or printed paper) customarily and legally used as a medium of exchange, a measure of value, or a means of payment.

King's ransom and long green are semantically related. Sometimes you can use "King's ransom" instead a noun phrase "Long green".