A vicinal, as defined in Dave Morice's The Dictionary of Wordplay, is a word in which each letter has an alphabetic neighbor; that is, each letter in the word occupies a position in the alphabet next to another letter that appears in the word. (The term was created by Eugene Ulrich in the August 1983 Kickshaws.) Let us write the alphabet in a circle, regarding A and Z as alphabetic neighbors as well. Here is a collection of heterograms words with no repeated letters that are vicinals.
"Vicinal and Nonvicinal Heterograms,"
Word Ways: Vol. 38
, Article 20.
Available at: https://digitalcommons.butler.edu/wordways/vol38/iss1/20