Needing a new thesaurus I bought this American version. Reviews were positive and it was cheap. A mistake. For a crossword clue I needed a four letter word beginning with k for an avian preditor. I tried "hawk" but there was no entry for it. I tried "falcon",kestral" and "eagle" but again no entries. "Kite" was the obvious answer from my falling - apart Penguin thesaurus. This Princeton volume boasts on the backcover that it contains no obsolete terms. Hard to believe these words are obsolete in America, especially "eagle". Maybe I will just buy an up to date Penguin.