| MRZIP | Character used by the United States Postal Service |
| EAGLE | Bird in the United States Postal Service logo |
| NOR | Word that appeared thrice in the United States Postal Service creed |
| ZIP | - code, five- or nine-digit number used by the US postal service |
| CITYSTATEANDZIP | Items of concern to the US Postal Service |
| UPS | Private alternative to the US Postal Service |
| ASAWA | Ruth ___, sculptor in whose honour the US Postal Service issued stamps in 2020 (5) |
| LOUISIANA | The western part of this state on the Mississippi was acquired by the United States by the purchase in 1803 which included a huge area of the Midwest |
| ETA | Character used by Onassis |
| LAMBDA | Character used by Plato signifying a ram? (6) |
| FLYLIKEANEAGLE | Steve Miller song now used in US Postal Service ads |
| PASSWORD | Secret series of characters used by father with small weapon |
| STAMP | US Postal Service purchase |
| BIKINI | Atoll in the Marshall Islands in the central Pacific used as a nuclear weapon testing site by the United States between 1946 and 1958 (6) |
| BAJACALIFORNIA | Spanish name for Lower California, the peninsula of northwestern Mexico, bounded by the United States, the Gulf of California, and the Pacific Ocean. (4,10) |
| EXPLORER | Name for the first space satellite orbited by the United States, in 1958, and any of the largest series of uncrewed U.S. spacecraft, consisting of 55 scientific satellites launched between 1958 and 19 |
| PURCHASE | Louisiana _, the 1803 acquisition of Louisiana by the United States from the French First Republic (8) |
| RHODE | The R in the state postal abbreviation RI |
| NAFTA | The 1992 trade agreement that was replaced by the United States-Mexico-Canada Agreement on July 1, 2020 |
| BIGBIRD | In 2000, which Sesame Street character was named a Living Legend by the United States Library of Congress? (3,4) |
