- Collins COBUILD Advanced Learner's English Dictionary (C)2003 HarperCollins Publishers. - Collins COBUILD English Grammar (c)1990 HarperCollins Publishers. - Collins Thesaurus (c)2001 HarperCollins Publishers. - Collins COBUILD English Usage (c)1992 HarperCollins Publishers. - Wordbank A corpus of five million words of texts extracted from the "Bank of English".