longest english word with unque letters

[Skaperen]

what is the longest English word with all unique letters, that is, no duplicate letters. an example is "junkyard". "bar" fits the definition, too, but "junkyard" is longer. anything longer that? i know there is. so, what is the longest? a long word that does not fit the definition is "misinterpretations". there are a few duplicate letters in there, such as "i", "s", "n", "t", "e" and "r".