rapscallion vs knave

rapscallion and knave both are nouns.

Word	Noun	Adjective	Verb	Adverb
rapscallion	Yes	No	No	No
knave	Yes	No	No	No

As nouns, rapscallion and knave are synonyms defined as:

Other synonyms of rapscallion include rascal, rogue, scalawag, scallywag, varlet.

rapscallion (noun)	knave (noun)
one who is playfully mischievous	one of four face cards in a deck bearing a picture of a young prince
a deceitful and unreliable scoundrel	a deceitful and unreliable scoundrel