scupper vs drain

scupper and drain both are nouns.

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

As nouns, drain is a hypernym of scupper; that is, drain is a word with a broader meaning than scupper:

Other hypernyms of scupper include drainpipe, waste pipe.

scupper (noun)	drain (noun)
drain that allows water on the deck of a vessel to flow overboard	emptying something accomplished by allowing liquid to run out of it
	a gradual depletion of energy or resources
	a pipe through which liquid is carried away
	tube inserted into a body cavity (as during surgery) to remove unwanted material

scupper (verb)	drain (verb)
put in a dangerous, disadvantageous, or difficult position	empty of liquid; drain the liquid from
wait in hiding to attack	make weak
	deplete of resources
	flow off gradually