jackanapes vs whippersnapper

jackanapes and whippersnapper both are nouns.

Word	Noun	Adjective	Verb	Adverb
jackanapes	Yes	No	No	No
whippersnapper	Yes	No	No	No

As nouns, jackanapes and whippersnapper are synonyms defined as:

jackanapes and whippersnapper: someone who is unimportant but cheeky and presumptuous

Other synonyms of jackanapes include lightweight.

jackanapes (noun)	whippersnapper (noun)
someone who is unimportant but cheeky and presumptuous	someone who is unimportant but cheeky and presumptuous