Gulf

(noun) an arm of a sea or ocean partly enclosed by land; larger than a bay. Synonyms: gulf.

(noun) an unbridgeable disparity (as from a failure of understanding). Synonyms: gulf, disconnect, disconnection. Examples: "He felt a gulf between himself and his former friends." "There is a vast disconnect between public opinion and federal policy."

(noun) a deep wide chasm. Synonyms: gulf.