airport (n.)youdaoicibaDictYouDict
1919, from air (n.1) + port (n.1). First reference is to Bader Field, outside Atlantic City, New Jersey, U.S., which opened in 1910.
beachfront (adj.)youdaoicibaDictYouDict
also beach-front, 1903, American English, from beach (n.) + front (n.). The beach front was a standard way in late 19c. to express "the seashore of a town" such as Atlantic City.
boardwalk (n.)youdaoicibaDictYouDict
"walkway made of boards," 1864, American English, from board (n.1) + walk (n.). As a seaside attraction from 1881, first in reference to Atlantic City, N.J.
salt water (n.)youdaoicibaDictYouDict
Old English sealtera watera. As an adjective from 1520s. Salt-water taffy attested by 1886; so called because it originally was sold at seashore resorts, especially Atlantic City, N.J. (see taffy).