As verbs the difference between interchange and counter
is that
interchange is to switch (each of two things) while
counter is to contradict, oppose.
As nouns the difference between interchange and counter
is that
interchange is an act of interchanging while
counter is an object (now especially a small disc) used in counting or keeping count, or as a marker in games, etc or
counter can be (nautical) the overhanging stern of a vessel above the waterline or
counter can be (obsolete) an encounter.
As an adverb counter is
contrary, in opposition; in an opposite direction or
counter can be in opposition; in an opposite direction; contrariwise.
As an adjective counter is
contrary; opposite; contrasted; opposed; adverse; antagonistic.