sneaky vs surreptitious

sneaky and surreptitious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
sneaky	No	Yes	No	No
surreptitious	No	Yes	No	No

As adjectives, sneaky and surreptitious are synonyms defined as:

sneaky and surreptitious: marked by quiet and caution and secrecy; taking pains to avoid being observed

Other synonyms of sneaky include furtive, sneak, stealthy.

sneaky (adjective)	surreptitious (adjective)
marked by quiet and caution and secrecy; taking pains to avoid being observed	marked by quiet and caution and secrecy; taking pains to avoid being observed
marked by deception	conducted with or marked by hidden aims or methods