knavishly vs cunningly

knavishly and cunningly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
knavishly	No	No	No	Yes
cunningly	No	No	No	Yes

As adverbs, knavishly and cunningly are synonyms defined as:

Other synonyms of knavishly include artfully, craftily, foxily, slyly, trickily.

knavishly (adverb)	cunningly (adverb)
in an subtle, cunning manner	in an subtle, cunning manner
	in an attractive manner