Vicinal (logology)

A vicinal is a logological term for a word where all its letters have "alphabetic neighbors". For instance, if a word has an "O" in it, to be a vicinal it must also have an "N" and/or a "P". If none of the letters have alphabetic neighbors, it is known as a nonvicinal.

Some vicinals:
 * Blacksmith
 * Documents
 * Done
 * Fights
 * High
 * On
 * Sport
 * This

Some nonvicinals:
 * As
 * In
 * Intelligibility
 * Lacqueying
 * Mississippi
 * Mortgage
 * The

Some words that are neither:
 * About
 * Almanac
 * Dictionary
 * Times
 * Wisconsin