scupper vs lurk

scupper is a noun but lurk is not a noun.

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

As verbs, scupper and lurk are synonyms defined as:

Other synonyms of scupper include ambuscade, ambush, bushwhack, lie in wait, waylay.

scupper (noun)	lurk (noun)
drain that allows water on the deck of a vessel to flow overboard

scupper (verb)	lurk (verb)
put in a dangerous, disadvantageous, or difficult position	wait in hiding to attack
wait in hiding to attack	to monitor a web forum or similar without making your presence pubilc
	be about a place without any apparent purpose
	lie in wait, lie in ambush, behave in a sneaky and secretive manner