He also edited The Hammond Barnhart Dictionary of Science (1986), also published as The American Heritage Dictionary of Science (1988). Perhaps his major work is The Barnhart Dictionary of Etymology (1988), which is marketed under the title Chambers Dictionary of Etymology in the United Kingdom. It is one of the most comprehensive volumes of its kind. He edited an abridgement, The Barnhart Concise Dictionary of Etymology (1995). His Barnhart Abbreviations Dictionary (1995) includes a reverse list of what the abbreviations stand for.