Wiktionary
COUNTERCHANGE, verb. To give and receive; to cause to change places; to exchange.
COUNTERCHANGE, verb. To checker; to diversify, as in heraldic counterchanging.
COUNTERCHANGE, noun. (obsolete) An exchange of one thing for another.
COUNTERCHANGE, noun. (obsolete) Due return (for an action etc.); reciprocation.
Dictionary definition
COUNTERCHANGE, verb. Cause to change places; "interchange this screw for one of a smaller size".
Wise words
Words are cheap. The biggest thing you can say is
'elephant'.