C3O1U1N1T1E1R1C3H4A1N1G2E1
21 points
COUNTERCHANGE is validvalid
[v COUNTERCHANGED, COUNTERCHANGES, COUNTERCHANGING]
to interchange, transpose [v COUNTERCHANGED, COUNTERCHANGING, COUNTERCHANGES]
[v COUNTERCHANGED, COUNTERCHANGES, COUNTERCHANGING]
to interchange, transpose [v COUNTERCHANGED, COUNTERCHANGING, COUNTERCHANGES]