artfully vs slyly

artfully and slyly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
artfully	No	No	No	Yes
slyly	No	No	No	Yes

As adverbs, artfully and slyly are synonyms defined as:

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

artfully (adverb)	slyly (adverb)
in a manner exhibiting art or skill	in an subtle, cunning manner
in a disingenuous manner
in an subtle, cunning manner