Teasurus Bahasa Indonesia (Bahasa Indonesia Thesaurus) was published in early December 2006. Eko Endarmoko had spent for about 25 years to complete this thesaurus, beginning from “a task” from his lecture, Anton M Moeliono, who is one of Bahasa Indonesia experts. Consisting about 16.000 entries, Salomo Simanungkalit, language columnist in national newspaper, Kompas, appreciated Tesaurus as a very valuable contribution to Indonesian culture (in Bahasa Indonesia). Salomo also compare this project with Kamus Besar Bahasa Indonesia (main Indonesian dictionary) which was arranged by tens of experts and having 78.000 entries.

Tesaurus is not first Indonesian thesaurus, but Eko has done his project very well. He learnt most from prior thesaurus and made serious revisions. This book will become one of important resources for writers from various discipline.