caper vs tomfoolery

caper and tomfoolery both are nouns.

Word	Noun	Adjective	Verb	Adverb
caper	Yes	No	Yes	No
tomfoolery	Yes	No	No	No

As nouns, tomfoolery is a hyponym of caper; that is, tomfoolery is a word with a more specific, narrower meaning than caper:

caper: gay or light-hearted recreational activity for diversion or amusement
tomfoolery: foolish or senseless behavior

caper (noun)	tomfoolery (noun)
gay or light-hearted recreational activity for diversion or amusement	foolish or senseless behavior
a crime (especially a robbery)
a ludicrous or grotesque act done for fun and amusement
a playful leap or hop
pickled flower buds used as a pungent relish in various dishes and sauces
any of numerous plants of the genus Capparis

caper (verb)	tomfoolery (verb)
jump about playfully