6.4 Solid Compound Words [X.34.b(4)]

As has been stated previously, contractions are not used where they fall partly into one component of a solid compound word and partly into another. Thus, the sign for ed is not used in kettledrum, the sign for er is not used in stateroom, the sign for th is not used in sweetheart, and the sign for gh is not used in foghorn. Nor is the st contracted in proper names such as Johnstown or Charlestown. (Note, however, that when such names are shortened to Johnston or Charleston, the st contraction is used.)