9. The method according to claim 1 , wherein identifying the one or more suggested replacement keywords for the one or more of the keywords of the search query comprises identifying synonyms of the one or more of the keywords of the search query as the one or more suggested replacement keywords.
12. The method according to claim 9 , wherein identifying the synonyms of the one or more of the keywords of the search query comprises: retrieving, from a lexical database, respective measures of strength of synonymy between each of the synonyms and its synonymous keyword of the search query; and selecting only the synonyms having the greatest measures of strength as the identified synonyms.