Diversion is a related term of caper.
As nouns the difference between diversion and caper
is that
diversion is fun, entertainment, levity while
caper is a frolicsome leap or spring; a skip; a jump, as in mirth or dancing; a prank or
caper can be a vessel formerly used by the dutch; privateer or
caper can be the pungent grayish green flower bud of the european and oriental caper (
capparis spinosa ), which is pickled and eaten or
caper can be (scotland) the capercaillie.
As a verb caper is
to leap or jump about in a sprightly manner; to cut capers; to skip; to spring; to prance; to dance.