pilfer vs sneak

pilfer is not a noun while sneak is a noun.

Word	Noun	Adjective	Verb	Adverb
pilfer	No	No	Yes	No
sneak	Yes	Yes	Yes	No

As verbs, pilfer and sneak are synonyms defined as:

Other synonyms of pilfer include abstract, cabbage, filch, hook, lift, nobble, pinch, purloin, snarf, swipe.

pilfer (noun)	sneak (noun)
	someone acting as an informer or decoy for the police
	someone who prowls or sneaks about; usually with unlawful intentions
	a person who is regarded as underhanded and furtive and contemptible

pilfer (adjective)	sneak (adjective)
	marked by quiet and caution and secrecy; taking pains to avoid being observed

pilfer (verb)	sneak (verb)
make off with belongings of others	to go stealthily or furtively
	make off with belongings of others
	pass on stealthily
	put, bring, or take in a secretive or furtive manner