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:
Some nonvicinals:
Some words that are neither: