LEXICAL COHESION. Continuity may be established in a text by the choice of words. This may take the form of word repetition; or the choice of a word that is related in some way to a previous one – either semantically, such that the two are in the broadest sense synonymous, or collocationally, such that the two have a more than ordinary tendency to co-occur. Lexical cohesion may be maintained over long passages by the presence of keywords, words having special significance for the meaning of the particular text.
- Halliday (1985), Pag. 289