The four-letter words below have two things in common. Can you determine what they are?

ALGA
ALMS
ARMS
CONE
INKY
MANY
MOIL
ORCA

Answers:

The words are formed by combining the two-letter postal abbreviations of two states, AND, in each case, the two states share a border. For example, INKY is IN (Indiana) and KY (Kentucky), which share a border. 

Credit: GAMES Magazine
August, 1992
Arnie Danoff
BORDERLINE WORDS