skulk vs lurk

skulk and lurk both are verbs.

Word	Noun	Adjective	Verb	Adverb
skulk	No	No	Yes	No
lurk	No	No	Yes	No

As verbs, skulk and lurk are synonyms defined as:

skulk and lurk: lie in wait, lie in ambush, behave in a sneaky and secretive manner

skulk (verb)	lurk (verb)
move furtively	wait in hiding to attack
avoid responsibilities and duties, e.g., by pretending to be ill	to monitor a web forum or similar without making your presence pubilc
lie in wait, lie in ambush, behave in a sneaky and secretive manner	be about a place without any apparent purpose
	lie in wait, lie in ambush, behave in a sneaky and secretive manner