Uncopyrightable

Years ago, I read that "Uncopyrightable" was the longest word in the English language that did not repeat a letter. I turns out that is is the longest "Common" word, but there are others:

Dermatoglyphics, misconjugatedly also have 15 non-repeating letters. "Subdermatoglyphic" has 17 letters.
From: Word Trivia