The Collaborative International Dictionary of English v.0.48:

Fjord \Fjord\ (fy[^o]rd), n.
   See Fiord.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fiord \Fiord\ (fy?rd; i or y consonant, [sect] 272), n. [Dan. &
   Norw. fiord. See Frith.]
   A narrow inlet of the sea, penetrating between high banks or
   rocks, as on the coasts of Norway and Alaska. [Written also
   fjord.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

fjord
    n 1: a long narrow inlet of the sea between steep cliffs; common
         in Norway [syn: fjord, fiord]