bear on vs scupper

bear on is not a noun while scupper is a noun.

Word	Noun	Adjective	Verb	Adverb
bear on	No	No	Yes	No
scupper	Yes	No	Yes	No

As verbs, scupper is a hyponym of bear on; that is, scupper is a word with a more specific, narrower meaning than bear on:

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

bear on (verb)	scupper (verb)
have an effect upon	put in a dangerous, disadvantageous, or difficult position
press, drive, or impel (someone) to action or completion of an action	wait in hiding to attack
be relevant to
keep or maintain in unaltered condition; cause to remain or last